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New “corpse disposal” theory tested in William Tyrrell inquest

<p>A police theory that William Tyrrell's foster mother unlawfully disposed of the child's body after he died of an accident is set to be put before the court in an inquest into Tyrrell's disappearance. </p> <p>On Monday, counsel assisting Gerard Craddock SC reopened the inquest for a fifth round of evidence, saying the focus would be on the viability of the theory that William's body was purposefully disposed of. </p> <p>Police have alleged that after the then three-year-old died on the Kendall property on the mid-north NSW coast in September 2014, the foster mum might have loaded his body into her mother’s Mazda before driving down the road to dispose of his remains.</p> <p>Deputy NSW coroner Harriet Grahame heard in court that it was only then that she may have called triple zero to report the child missing. </p> <p>“Police assert that she must have quickly resolved that if the accidental death were to be discovered, she might lose (her other foster child),” Craddock said.</p> <p>Tyrrell's foster mother has long denied having any involvement with William's disappearance. </p> <p>Later in the inquest, evidence is set to be given from a truck driver who drove past where the foster mother allegedly disposed of the body at the time.</p> <p>The inquest into William’s disappearance began in March 2019 but was adjourned in October 2020.</p> <p>No one has been charged and a $1 million reward for information stands.</p> <p><em>Image credits: NSW Police</em></p>

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From eye exams to blood tests and surgery: how doctors use light to diagnose disease

<div class="theconversation-article-body"><em><a href="https://theconversation.com/profiles/matthew-griffith-1539353">Matthew Griffith</a>, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p>You’re not feeling well. You’ve had a pounding headache all week, dizzy spells and have vomited up your past few meals.</p> <p>You visit your GP to get some answers and sit while they shine a light in your eyes, order a blood test and request some medical imaging.</p> <p>Everything your GP just did relies on light. These are just some of the optical technologies that have had an enormous impact in how we diagnose disease.</p> <h2>1. On-the-spot tests</h2> <p>Point-of-care diagnostics allow doctors to test patients on the spot and get answers in minutes, rather than sending samples to a lab for analysis.</p> <p>The “flashlight” your GP uses to view the inside of your eye (known as an <a href="https://medlineplus.gov/ency/article/003881.htm">ophthalmoscope</a>) is a great example. This allows doctors to detect abnormal blood flow in the eye, deformations of the cornea (the outermost clear layer of the eye), or swollen optical discs (a round section at the back of the eye where the nerve link to the brain begins). Swollen discs are a sign of elevated pressure inside your head (or in the worst case, a brain tumour) that could be <a href="https://www.hopkinsmedicine.org/health/conditions-and-diseases/headache/increased-intracranial-pressure-icp-headache">causing your headaches</a>.</p> <p>The invention of <a href="https://openmedscience.com/lighting-the-way-in-healthcare-the-transformative-role-of-lasers-in-medicine/">lasers and LEDs</a> has enabled many other miniaturised technologies to be provided at the bedside or clinic rather than in the lab.</p> <p><a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">Pulse oximetry</a> is a famous example, where a clip attached to your finger reports how well your blood is oxygenated. It does this by <a href="https://www.howequipmentworks.com/pulse_oximeter/">measuring</a> the different responses of oxygenated and de-oxygenated blood to different colours of light.</p> <p>Pulse oximetry is used at hospitals (and <a href="https://theconversation.com/whats-a-pulse-oximeter-should-i-buy-one-to-monitor-covid-at-home-174457">sometimes at home</a>) to monitor your respiratory and heart health. In hospitals, it is also a valuable tool for detecting <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(12)60107-X/fulltext">heart defects in babies</a>.</p> <h2>2. Looking at molecules</h2> <p>Now, back to that blood test. Analysing a small amount of your blood can diagnose <a href="https://theconversation.com/blood-tests-and-diagnosing-illness-what-can-blood-tell-us-about-whats-happening-in-our-body-80327">many different diseases</a>.</p> <p>A machine called an automated “full blood count analyser” tests for general markers of your health. This machine directs focused beams of light through blood samples held in small glass tubes. It counts the number of blood cells, determines their specific type, and reports the level of haemoglobin (the protein in red blood cells that distributes oxygen around your body). In minutes, this machine can provide a <a href="https://www.nuffieldhealth.com/article/inside-the-pathology-lab-what-happens-to-my-blood">snapshot</a> of your overall health.</p> <p>For more specific disease markers, blood serum is separated from the heavier cells by spinning in a rotating instrument called a centrifuge. The serum is then exposed to special chemical stains and enzyme assays that change colour depending on whether specific molecules, which may be the sign of a disease, are present.</p> <p>These colour changes can’t be detected with the naked eye. However, a light beam from an instrument called a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5476943/#R88">spectrometer</a> can detect tiny amounts of these substances in the blood and determine if the biomarkers for diseases are present, and at what levels.</p> <h2>3. Medical imaging</h2> <p>Let’s re-visit those medical images your GP ordered. The development of fibre-optic technology, made famous for transforming high-speed digital communications (such as the NBN), allows light to get inside the body. The result? High-resolution optical imaging.</p> <p>A common example is an <a href="https://www.medicalnewstoday.com/articles/153737#risks-and-side-effects">endoscope</a>, where fibres with a tiny camera on the end are inserted into the body’s natural openings (such as your mouth or anus) to examine your gut or respiratory tracts.</p> <p>Surgeons can insert the same technology through tiny cuts to view the inside of the body on a video screen during <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9553337/">laparoscopic surgery</a> (also known as keyhole surgery) to diagnose and treat disease.</p> <h2>How about the future?</h2> <p>Progress in nanotechnology and a better understanding of the interactions of light with our tissues are leading to new light-based tools to help diagnose disease. These include:</p> <ul> <li> <p><a href="https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201903441">nanomaterials</a> (materials on an extremely small scale, many thousands of times smaller than the width of a human hair). These are being used in next-generation sensors and new diagnostic tests</p> </li> <li> <p><a href="https://www.nature.com/articles/s41587-019-0045-y">wearable optical biosensors</a> the size of your fingernail can be included in devices such as watches, contact lenses or finger wraps. These devices allow non-invasive measurements of sweat, tears and saliva, in real time</p> </li> <li> <p>AI tools to analyse how blood serum scatters infrared light. This has allowed researchers to build a <a href="https://www.advancedsciencenews.com/powerful-diagnostic-approach-uses-light-to-detect-virtually-all-forms-of-cancer/">comprehensive database</a> of scatter patterns to detect <a href="https://onlinelibrary.wiley.com/doi/full/10.1002/aisy.202300006">any cancer</a></p> </li> <li> <p>a type of non-invasive imaging called <a href="https://www.ncbi.nlm.nih.gov/books/NBK554044/">optical coherence tomography</a> for more detailed imaging of the eye, heart and skin</p> </li> <li> <p>fibre optic technology to deliver a tiny microscope into the body on the <a href="https://www.uwa.edu.au/projects/microscope-in-a-needle">tip of a needle</a>.</p> </li> </ul> <p>So the next time you’re at the GP and they perform (or order) some tests, chances are that at least one of those tests depend on light to help diagnose disease.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/231379/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/matthew-griffith-1539353"><em>Matthew Griffith</em></a><em>, Associate Professor and ARC Future Fellow and Director, UniSA Microscopy and Microanalysis Facilities, <a href="https://theconversation.com/institutions/university-of-south-australia-1180">University of South Australia</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/from-eye-exams-to-blood-tests-and-surgery-how-doctors-use-light-to-diagnose-disease-231379">original article</a>.</em></p> </div>

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Simon Dorante-Day calls for "four-way paternity test" to prove royal lineage

<p>Simon Dorante-Day has called for a "four-way paternity test" to prove his royal lineage, while also casting doubt on if Prince William and Prince Harry are actually sons of the monarch. </p> <p>The Queensland man, who has been claiming to be the secret son of King Charles and Queen Camilla since 2005, has called for an official DNA test to prove his claims in a lengthy Facebook post. </p> <p>Dorante-Day's post highlights a photo comparison of himself, King Charles and William and Harry as evidence supporting his demand for answers from the royal family. </p> <p>“This comparison of William, Myself, Charles, and Harry demonstrates something very clearly, there is no consistency. The fact that the left side of my face identically matches Charles whilst neither William nor Harry’s does, raises the obvious question, just who are Charles’s real sons?”</p> <p>"This is why my wife, Dr. Elvianna, and I believe a 4-way Paternity test is the only way to resolve this issue once and for all. The truth of the game that has been played by the Monarchy, the Government, and the Establishment for 58 years needs to be exposed."</p> <p>"It's not just what happened to me as a child, and what I remember from growing up in England, but it’s also what’s happened since to myself, my wife, and my children in Australia that supports our argument. These covert and illegitimate activities that are targeted towards us constantly are an attempt to stop us on this journey, nothing more. They will not succeed. They will only strengthen our argument and provides us with evidence to demonstrate what has occurred, in a court room, to judges."</p> <p>"My question to all of you is how will you truly react when you hear the truth of what has occurred? Would you still want them on the throne?"</p> <p>Dorante-Day was born in Portsmouth in the UK in 1966, and was adopted at just eight months old. According to his claims, his adoptive mother, who worked for Queen Elizabeth II confessed on her death bed that he was the son of Charles and Camilla.</p> <p><em>Image credits: Facebook</em></p>

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Lisa Curry recounts her Olympics "gender test" ordeal

<p>On Friday, the opening ceremony of the Paris Olympics will begin and swimming legend Lisa Curry has opened up about her own experiences competing in the games, and how she had to take a "gender test" in 1992.</p> <p>"Found this yesterday and thought it would be fun to do a show and tell of a few past stories leading up to Fridays Opening Ceremony of the 2024 Olympic Games in Paris," she shared on Instagram alongside a photo of the gender certificate she received. </p> <p>"This was a card given to all athletes competing in 1992 Barcelona after they completed a 'gender test'," she continued. </p> <p>"I wonder if they still do it?"</p> <p>Curry, 61, was one of the golden girls of Australian swimming, representing the nation at three Olympics during a career that spanned 23 years. </p> <p>The Olympian went on to explain that the man who signed her card was Alexandre de Merode, the head of the drug testing policy for the International Olympic Committee at the time. </p> <p>De Merode had a controversial career after he was involved in a number of Olympic drug scandals at Los Angeles in 1984 and Seoul in 1988. </p> <p>"This definitely surprised me… or does it?" Curry continued. </p> <p>"And it was at these Barcelona Games where we swam against the Chinese swimmers," she added. </p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-permalink="https://www.instagram.com/p/C9vefXRTlW8/?utm_source=ig_embed&amp;utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/p/C9vefXRTlW8/?utm_source=ig_embed&amp;utm_campaign=loading" target="_blank" rel="noopener">A post shared by Lisa Curry AO (@lisacurry)</a></p> </div> </blockquote> <p>In the early 1990s, the Chinese swimmers began to dominate the pool and eventually won a lot of medals, however they were also notorious for doping with more than 40 Chinese swimmers failing drug tests during the decade. </p> <p>In a <a href="https://www.instagram.com/p/C9yD4WSzdF-/" target="_blank" rel="noopener">follow up post</a>, Curry showed off a special ring that she still wears to commemorate the Olympics, and recalled her training back in 1992. </p> <p>"Morgan was a toddler when I competed in Barcelona and now when I’m looking after her babies, I remember the training, relentlessly, day in day out for the biggest moment of my life," she wrote. </p> <p>"Competing as a mum of 2, and being in the best shape of my life was my career highlight," she added. </p> <p>"This Olympic ring has been on my little finger for 32 years. It’s a reminder of the dedication, perseverance and resilience you need to keep going, even when you don’t have anything left in the tank." </p> <p>She then added a few words of encouragement for all the athletes competing in the Olympics, before adding: "Only some will win, but the opportunity you get to be an Olympian and call yourself an Olympian is forever."</p> <p><em><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;">Images: Instagram</span></em></p> <p> </p>

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Take my (bad) breath away – causes of halitosis and how to check whether you have it

<div class="theconversation-article-body"><em><a href="https://theconversation.com/profiles/dan-baumgardt-1451396">Dan Baumgardt</a>, <a href="https://theconversation.com/institutions/university-of-bristol-1211">University of Bristol</a></em></p> <p>In Greek mythology, the many-headed beast <a href="https://mythopedia.com/topics/hydra">Hydra</a> had such severe <a href="https://patient.info/oral-dental-care/bad-breath-halitosis">halitosis</a> that the stench of its breath was deadly to anyone who smelled it. Thankfully, our morning breath might not be that pungent – although eating <a href="https://www.healthline.com/health/get-rid-of-garlic-onion-breath">onions or garlic</a> can put some people in competition with the Hydra.</p> <p>Halitosis has many causes (aside from poor oral hygiene) and can indicate problems with the gut, the sinuses and even the bloodstream. In fact, breath samples can even be tested to make formal diagnoses of health conditions.</p> <p>One condition that can affect the smell of breath is <a href="https://www.diabetes.org.uk/">diabetes mellitus</a>. This is a metabolic disorder where sugar (glucose) is unable to access the body’s cells where it is needed to provide energy, and so rises in the bloodstream.</p> <p>In some instances, such as insufficient insulin dosing, or infection, the body’s response is to break down fats into compounds called ketones to act as a rapid form of fuel. This serious condition is called <a href="https://www.nhs.uk/conditions/diabetic-ketoacidosis/">diabetic ketoacidosis</a>.</p> <p>Ketones have a distinctive scent. <a href="https://www.gov.uk/government/publications/acetone-properties-and-incident-management/acetone-general-information">Acetone</a>, which is also an ingredient in some nail varnish removers, is one of these ketones and has the smell of pear drops. When ketones build up in the bloodstream they easily <a href="https://iopscience.iop.org/article/10.1088/0967-3334/32/8/N01/pdf">diffuse into the breath</a>, giving it a <a href="https://www.medicalnewstoday.com/articles/319683">fruity odour</a>.</p> <p>It’s not just diabetes that can trigger ketone production. <a href="https://pubmed.ncbi.nlm.nih.gov/36033148/">Some diets</a> are based on generating ketones from the breakdown of fats to promote weight loss. These methods, such as the <a href="https://www.healthline.com/nutrition/atkins-diet-101">Atkins diet</a>, force the body to convert fat into energy by restricting carbohydrates.</p> <figure><iframe src="https://www.youtube.com/embed/5U8IDO1fHlU?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>Other diets based on the same principles include the <a href="https://patient.info/healthy-living/weight-loss-weight-reduction/52-diet">5:2</a> intermittent fasting diet. On this diet, followers restrict food intake on two days of the week to significantly reduce calorie consumption – and make the body produce ketones.</p> <p>These diets may help weight loss, but the side-effects can be grim. One of the most notorious side-effects is foul breath, although there are also anecdotal reports of <a href="https://www.forbes.com/sites/brucelee/2019/03/03/is-keto-crotch-really-a-side-effect-of-the-keto-diet/">“keto crotch”</a> where some followers of keto diets complain of strong genital odour.</p> <h2>Bacteria and breath</h2> <p>Another cause of bad breath is an <a href="https://iopscience.iop.org/article/10.1088/1752-7155/4/1/017003/pdf">overgrowth of bacteria</a> that produce foul smells. There are plenty of nooks and crannies in the mouth for bacteria to hide, grow and fester, especially the hard-to-clean areas – in between the teeth, and in and around the gums and tongue – or out-of-reach places, such as right at the back of the mouth and the throat.</p> <p>The throat acts as a passage for food, fluids and air. Some patients can develop a condition called <a href="https://www.entuk.org/patients/conditions/49/pharyngeal_pouch_surgery_new">pharyngeal pouch</a>. This is where a pocket forms at the back of the pharynx (the medical name for the throat) in which food and fluids can accumulate, ferment and give breath a pungent odour.</p> <p>Bacteria can also trigger infections in the mouth, like tonsillitis and tooth abscesses where tissues become inflamed, or develop purulence (production of pus). Pus is a collection of different dead cells, including bacteria, and it too can give off a putrid smell.</p> <p>Also, <a href="https://pubmed.ncbi.nlm.nih.gov/25234037/">sinusitis</a> – which is an infection of the air-filled cavities in the skull – can drip foul-smelling infected secretions into the throat, causing bad breath.</p> <h2>Breath tests</h2> <p>Doctors can test breath for bacteria to diagnose some health conditions. For example, <em><a href="https://pubmed.ncbi.nlm.nih.gov/28891138/">Helicobacter pylori</a></em>, bacteria that can irritate the gut and lead to the development of potentially dangerous ulcers, turns the compound urea into carbon dioxide. To test for <em>H pylori</em>, a <a href="https://www.nhs.uk/conditions/stomach-ulcer/diagnosis/">diagnostic breath test</a> is performed before and after dosing a patient with urea. If the patient exhales increased levels of carbon dioxide after being dosed with urea, then the test is positive.</p> <p>Breath can also be tested for an overgrowth of bacteria in the <a href="https://www.healthline.com/health/sibo">small intestine</a> (Sibo), which can lead to symptoms like abdominal pain and bloating. Sibo produces gases like hydrogen and methane that can also be detected with a breath test.</p> <p>If you’re worried about pongy breath and don’t have any medical issues, then you can <a href="https://www.healthline.com/health/dental-and-oral-health/how-to-smell-your-own-breath">test your own breath</a>. The age-old method is to lick the back of your wrist, let it dry and then have a sniff. You can also do the same with a tongue scraper, dental floss or a sample of breath exhaled into a cupped hand.</p> <figure><iframe src="https://www.youtube.com/embed/ak5UEM8FK2s?wmode=transparent&amp;start=0" width="440" height="260" frameborder="0" allowfullscreen="allowfullscreen"></iframe></figure> <p>Often, we can become used to the smell of our own breath. We might only notice when it becomes really bad, or when there are other symptoms, like a foul taste in the mouth. Or when someone plucks up the courage to finally tell you that you have a case of the breath pongs.</p> <p>Suppose someone has broken the news – what do you do now? <a href="https://www.nhs.uk/conditions/bad-breath/">Simple measures can work well</a>, including regular fluid intake – <a href="https://www.dentalhealth.org/bad-breath">dry mouth</a> can lead to bad breath so make sure you’re drinking enough water – and good oral hygiene. This involves brushing the teeth, tongue and flossing between your teeth to eliminate any bacterial hot spots, as well as regular checkups at the dentist.</p> <p>Mouthwash can be an effective temporary solution but there’s evidence that a <a href="https://theconversation.com/eating-leafy-greens-could-be-better-for-oral-health-than-using-mouthwash-221181#:%7E:text=But%20research%20has%20indicated%20that,alternative%20for%20treating%20oral%20disease.">diet rich in leafy greens</a> might be even better at countering bad breath.</p> <p>Smoking is another potential underlying <a href="https://www.healthline.com/health/how-to-get-rid-of-cigarette-breath#1-brush-teeth">cause of halitosis</a>. So if you want sweeter breath, pack in the cigarettes – yet another good reason to give up.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/231858/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/dan-baumgardt-1451396">Dan Baumgardt</a>, Senior Lecturer, School of Physiology, Pharmacology and Neuroscience, <a href="https://theconversation.com/institutions/university-of-bristol-1211">University of Bristol</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/take-my-bad-breath-away-causes-of-halitosis-and-how-to-check-whether-you-have-it-231858">original article</a>.</em></p> </div>

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What is ‘breathwork’? And do I need to do it?

<div class="theconversation-article-body"> <p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a> and <a href="https://theconversation.com/profiles/judy-pickard-831093">Judy Pickard</a>, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p>From “breathwork recipes” to breathing techniques, many <a href="https://www.instagram.com/p/C5WpkWxNrDI/">social media</a> and <a href="https://www.healthline.com/health/breathing-exercise">health websites</a> are recommending breathwork to reduce stress.</p> <p>But breathwork is not new. Rather it is the latest in a long history of breathing techniques such as <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7336946/">Pranayama</a> from India and <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9312231/#:%7E:text=Qigong%2C%20on%20the%20other%20hand,one%20or%20two%20balancing%20poses.">qigong</a> from China. Such practices have been used for thousands of years to promote a healthy mind and body.</p> <p>The benefits can be immediate and obvious. Try taking a deep breath in through your nose and exhaling slowly. Do you feel a little calmer?</p> <p>So, what’s the difference between the breathing we do to keep us alive and breathwork?</p> <h2>Breathwork is about control</h2> <p>Breathwork is <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9873947/#bib3">not the same</a> as <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189422/">other mindfulness practices</a>. While the latter focus on observing the breath, breathwork is about <a href="https://www.nature.com/articles/s41598-022-27247-y">controlling inhalation and exhalation</a>.</p> <p>Normally, breathing happens automatically via messages from the brain, outside our conscious control. But we can control our breath, by directing the movement of our diaphragm and mouth.</p> <p><a href="https://www.medicalnewstoday.com/articles/diaphragmatic-breathing">The diaphragm</a> is a large muscle that separates our thoracic (chest) and abdominal (belly) cavities. When the diaphragm contracts, it expands the thoracic cavity and pulls air into the lungs.</p> <p>Controlling how deep, how often, how fast and through what (nose or mouth) we inhale is the crux of breathwork, from <a href="https://www.healthline.com/health/breath-of-fire-yoga">fire breathing</a> to the <a href="https://www.headspace.com/content/meditation/humming-bee-breath/9422">humming bee breath</a>.</p> <h2>Breathwork can calm or excite</h2> <p>Even small bits of breathwork can have physical and mental health benefits and <a href="https://theconversation.com/stuck-in-fight-or-flight-mode-5-ways-to-complete-the-stress-cycle-and-avoid-burnout-or-depression-218599">complete the stress cycle</a> to avoid burnout.</p> <p>Calming breathwork includes diaphragmatic (belly) breathing, slow breathing, pausing between breaths, and specifically slowing down the exhale.</p> <p>In diaphragmatic breathing, you consciously contract your diaphragm down into your abdomen to inhale. This pushes your belly outwards and makes your breathing deeper and slower.</p> <p>You can also <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3681046/">slow the breath</a> by doing:</p> <ul> <li> <p><a href="https://www.medicalnewstoday.com/articles/321805">box breathing</a> (count to four for each of four steps: breathe in, hold, breathe out, hold), or</p> </li> <li> <p><a href="https://pubmed.ncbi.nlm.nih.gov/38092805/">coherent breathing</a> (controlled slow breathing of five or six breaths per minute), or</p> </li> <li> <p><a href="https://www.healthline.com/health/alternate-nostril-breathing#benefits">alternate nostril breathing</a> (close the left nostril and breathe in slowly through the right nostril, then close the right nostril and breathe out slowly through the left nostril, then repeat the opposite way).</p> </li> </ul> <p>You can slow down the exhalation specifically by counting, humming or pursing your lips as you breathe out.</p> <p>In contrast to these calming breathing practices, energising fast-paced breathwork increases arousal. For example, <a href="https://www.webmd.com/balance/what-is-breath-of-fire-yoga">fire breathing</a> (breathe in and out quickly, but not deeply, through your nose in a consistent rhythm) and <a href="https://www.healthline.com/health/breathing-exercise#breath-focus">Lion’s breath</a> (breathe out through your mouth, stick your tongue out and make a strong “haa” sound).</p> <h2>What is happening in the body?</h2> <p>Deep and slow breathing, especially with a long exhale, is the best way to <a href="https://theconversation.com/our-vagus-nerves-help-us-rest-digest-and-restore-can-you-really-reset-them-to-feel-better-210469">stimulate the vagus nerves</a>. The vagus nerves pass through the diaphragm and are the main nerves of the parasympathetic nervous system.</p> <p>Simulating the vagus nerves calms our sympathetic nervous system (fight or flight) stress response. This improves mood, lowers the stress hormone <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455070/">cortisol</a> and helps to regulate emotions and responses. It also promotes more <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137615/">coordinated brain activity</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189422/">improves immune function and reduces inflammation</a>.</p> <p>Taking deep, diaphragmatic breaths also has <a href="https://my.clevelandclinic.org/health/articles/9445-diaphragmatic-breathing">physical benefits</a>. This improves blood flow, lung function and exercise performance, increases oxygen in the body, and strengthens the diaphragm.</p> <p><a href="https://link.springer.com/article/10.1007/s12671-023-02294-2#:%7E:text=Accumulating%20evidence%20supports%20the%20efficacy,et%20al.%2C%202001">Slow breathing</a> reduces heart rate and blood pressure and increases heart rate variability (normal variation in <a href="https://www.health.harvard.edu/blog/heart-rate-variability-new-way-track-well-2017112212789">time between heart beats</a>). These are linked to better heart health.</p> <p>Taking shallow, quick, rhythmic breaths in and out through your nose stimulates the sympathetic nervous system. Short-term, controlled activation of the stress response is healthy and <a href="https://pubmed.ncbi.nlm.nih.gov/36624160/">develops resilience to stress</a>.</p> <h2>Breathing in through the nose</h2> <p>We are designed to <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6986941/">inhale through our nose</a>, not our mouth. Inside our nose are lots of <a href="https://www.ncbi.nlm.nih.gov/books/NBK544232/">blood vessels, mucous glands and tiny hairs called cilia</a>. These warm and humidify the air we breathe and filter out germs and toxins.</p> <p>We want the air that reaches our airways and lungs to be clean and moist. Cold and dry air is irritating to our nose and throat, and we don’t want germs to get into the body.</p> <p><a href="https://journals.physiology.org/doi/full/10.1152/ajpregu.00148.2023?utm_source=AJPRegu&amp;utm_medium=PressRelease&amp;utm_campaign=1.17.2024">Nasal breathing</a> increases parasympathetic activity and releases nitric oxide, which improves airway dilation and lowers blood pressure.</p> <p>Consistently breathing through our mouth <a href="https://www.sciencefocus.com/the-human-body/mouth-breathing">is not healthy</a>. It can lead to <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7455204/">pollutants</a> and <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8967998/#:%7E:text=Hence%2C%20we%20sought%20to%20synthesize,barriers%20to%20long%2Dterm%20enjoyment.">infections</a> reaching the lungs, snoring, sleep apnoea, and <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6986941/">dental issues</a> including cavities and jaw joint problems.</p> <h2>A free workout</h2> <p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5709795/">Slow breathing</a> – even short sessions at home – can reduce stress, anxiety and depression in the general population and among those with clinical depression or anxiety. Research on breathwork in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4309518/">helping post-traumatic stress disorder</a> (PTSD) is also promising.</p> <p>Diaphragmatic breathing to improve lung function and strengthen the diaphragm can improve breathing and exercise intolerance in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9690833/">chronic heart failure</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/33076360/">chronic obstructive pulmonary disease</a> and <a href="https://www.medicalnewstoday.com/articles/diaphragmatic-breathing#conditions-it-can-help-with">asthma</a>. It can also <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8967998/#:%7E:text=Hence%2C%20we%20sought%20to%20synthesize,barriers%20to%20long%2Dterm%20enjoyment.">improve exercise performance</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/19875429/">reduce oxidative stress</a> (an imbalance of more free radicals and/or less antioxidants, which can damage cells) after exercise.</p> <h2>A mind-body connection you can access any time</h2> <p>If you feel stressed or anxious, you might subconsciously <a href="https://www.betterhealth.vic.gov.au/health/healthyliving/breathing-to-reduce-stress">take shallow, quick breaths</a>, but this can make you feel more anxious. Deep diaphragmatic breaths through your nose and focusing on strong exhalations can help break this cycle and bring calm and mental clarity.</p> <p>Just <a href="https://www.nature.com/articles/s41598-022-27247-y">a few minutes a day</a> of breathwork can improve your physical and mental health and wellbeing. Daily deep breathing exercises <a href="https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2023.1040091/full">in the workplace</a> reduce blood pressure and stress, which is important since <a href="https://theconversation.com/what-is-burnout-and-how-to-prevent-it-in-the-workplace-insights-from-a-clinical-psychologist-196578">burnout rates are high</a>.</p> <p>Bottom line: any conscious control of your breath throughout the day is positive.</p> <p>So, next time you are waiting in a line, at traffic lights or for the kettle to boil, take a moment to focus on your breath. Breathe deeply into your belly through your nose, exhale slowly, and enjoy the benefits.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/231192/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/theresa-larkin-952095">Theresa Larkin</a>, Associate professor of Medical Sciences, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a> and <a href="https://theconversation.com/profiles/judy-pickard-831093">Judy Pickard</a>, Senior Lecturer, Clinical Psychology, <a href="https://theconversation.com/institutions/university-of-wollongong-711">University of Wollongong</a></em></p> <p><em>Image credits: Shutterstock </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/what-is-breathwork-and-do-i-need-to-do-it-231192">original article</a>.</em></p> </div>

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Advocates slam "ageist" call for older drivers to undergo mandatory testing

<p>A fresh push to make older drivers undergo mandatory health checks every year has been labelled ageist by advocates. </p> <p>General Practitioners have reignited the debate to introduce annual assessments for drivers in Victoria aged 75 and over, to bring the state in line with standards in other states including NSW, Queensland, WA and the Australian Capital Territory. </p> <p>“This is not about discriminating against older people, but a recognition that the skills that are required to drive safely can be lost as we get older,” the Royal Australian College of General Practitioners Victoria chair Dr Anita Muñoz told <em>The Age</em>. </p> <p>"We do feel that having an annual assessment done for elderly drivers is a good thing," the college's Victoria co-deputy chair Dr Bindiya Sethi added. </p> <p>Victoria Police data obtained by <em>The Age</em> also showed that 145 people have died and 7080 have been injured in road incidents caused by people aged over 65. </p> <p>20 per cent of licence holders in Victoria are over 65, which has gone up from 16 per cent a decade ago. </p> <p>In the last financial year, there were 247 deaths and 16,265 injuries caused by crashes on Victorian roads, with drivers aged 65 and over responsible for around 10 per cent of these incidences. </p> <p>However, Chris Potaris, chief executive of the Council on the Ageing Victoria and Seniors Rights Victoria, has called the move "ageist". </p> <p>“We continue to support Victoria’s approach, which emphasises a driver’s behaviour and medical fitness to operate a motor vehicle,” he told the publication. </p> <p>“Driving should be based on ability, not on age.”</p> <p>Seniors Rights Victoria policy and advocacy manager Ben Rogers has also slammed the move. </p> <p>"We find it ageist and arbitrary ... It's targeting people that don't need to be targeted," Rogers said. </p> <p>MP Steve Dimopolous added that there was no evidence that an aged-based assessment model was any better than the existing rules. </p> <p>VicRoads also claimed that there is a lot of misinformation about older drivers, who are "usually more cautious, more experienced and more responsible" than younger drivers.</p> <p> </p> <p>"They are more likely to obey the law and are less likely to drink drive or speed," VicRoads said.</p> <p>However, a few others believe that mandatory assessments are a good move. </p> <p>"I think it's fair enough. Over a certain age, maybe 70 or so," local man Pat said.</p> <p>"I think the younger drivers are worse than the older drivers," another added. </p> <p><em>Image: Getty</em></p>

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Centenarian blood tests give hints of the secrets to longevity

<p><em><a href="https://theconversation.com/profiles/karin-modig-1473484">Karin Modig</a>, <a href="https://theconversation.com/institutions/karolinska-institutet-1250">Karolinska Institutet</a></em></p> <p>Centenarians, once considered rare, have become commonplace. Indeed, they are the <a href="https://www.weforum.org/agenda/2021/02/living-to-one-hundred-life-expectancy/">fastest-growing demographic group</a> of the world’s population, with numbers roughly doubling every ten years since the 1970s.</p> <p>How long humans can live, and what determines a long and healthy life, have been of interest for as long as we know. Plato and Aristotle discussed and <a href="https://pubmed.ncbi.nlm.nih.gov/12092789/">wrote about the ageing process</a> over 2,300 years ago.</p> <p>The pursuit of understanding the secrets behind exceptional longevity isn’t easy, however. It involves <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7105197/">unravelling the complex interplay</a> of genetic predisposition and lifestyle factors and how they interact throughout a person’s life. Now our recent study, <a href="https://link.springer.com/article/10.1007/s11357-023-00936-w">published in GeroScience</a>, has unveiled some common biomarkers, including levels of cholesterol and glucose, in people who live past 90.</p> <p>Nonagenarians and centenarians have long been of intense interest to scientists as they may help us understand how to live longer, and perhaps also how to age in better health. So far, studies of centenarians have often been small scale and focused on a selected group, for example, excluding centenarians who live in care homes.</p> <h2>Huge dataset</h2> <p>Ours is the largest study comparing biomarker profiles measured throughout life among exceptionally long-lived people and their shorter-lived peers to date.</p> <p>We compared the biomarker profiles of people who went on to live past the age of 100, and their shorter-lived peers, and investigated the link between the profiles and the chance of becoming a centenarian.</p> <p>Our research included data from 44,000 Swedes who underwent health assessments at ages 64-99 - they were a sample of <a href="https://pubmed.ncbi.nlm.nih.gov/28158674/">the so-called Amoris cohort</a>. These participants were then followed through Swedish register data for up to 35 years. Of these people, 1,224, or 2.7%, lived to be 100 years old. The vast majority (85%) of the centenarians were female.</p> <p>Twelve blood-based biomarkers related to inflammation, metabolism, liver and kidney function, as well as potential malnutrition and anaemia, were included. All of these <a href="https://www.nature.com/articles/s41591-019-0719-5">have been associated</a> with ageing or mortality in previous studies.</p> <p>The biomarker related to inflammation was uric acid – a waste product in the body caused by the digestion of certain foods. We also looked at markers linked to metabolic status and function including total cholesterol and glucose, and ones related to liver function, such as alanine aminotransferase (Alat), aspartate aminotransferase (Asat), albumin, gamma-glutamyl transferase (GGT), alkaline phosphatase (Alp) and lactate dehydrogenase (LD).</p> <p>We also looked at creatinine, which is linked to kidney function, and iron and total iron-binding capacity (TIBC), which is linked to anaemia. Finally, we also investigated albumin, a biomarker associated with nutrition.</p> <h2>Findings</h2> <p>We found that, on the whole, those who made it to their hundredth birthday tended to have lower levels of glucose, creatinine and uric acid from their sixties onwards. Although the median values didn’t differ significantly between centenarians and non-centenarians for most biomarkers, centenarians seldom displayed extremely high or low values.</p> <p>For example, very few of the centenarians had a glucose level above 6.5 earlier in life, or a creatinine level above 125.</p> <p>For many of the biomarkers, both centenarians and non-centenarians had values outside of the range considered normal in clinical guidelines. This is probably because these guidelines are set based on a younger and healthier population.</p> <p>When exploring which biomarkers were linked to the likelihood of reaching 100, we found that all but two (alat and albumin) of the 12 biomarkers showed a connection to the likelihood of turning 100. This was even after accounting for age, sex and disease burden.</p> <p>The people in the lowest out of five groups for levels of total cholesterol and iron had a lower chance of reaching 100 years as compared to those with higher levels. Meanwhile, people with higher levels of glucose, creatinine, uric acid and markers for liver function also decreased the chance of becoming a centenarian.</p> <p>In absolute terms, the differences were rather small for some of the biomarkers, while for others the differences were somewhat more substantial.</p> <p>For uric acid, for instance, the absolute difference was 2.5 percentage points. This means that people in the group with the lowest uric acid had a 4% chance of turning 100 while in the group with the highest uric acid levels only 1.5% made it to age 100.</p> <p>Even if the differences we discovered were overall rather small, they suggest a potential link between metabolic health, nutrition and exceptional longevity.</p> <p>The study, however, does not allow any conclusions about which lifestyle factors or genes are responsible for the biomarker values. However, it is reasonable to think that factors such as nutrition and alcohol intake play a role. Keeping track of your kidney and liver values, as well as glucose and uric acid as you get older, is probably not a bad idea.</p> <p>That said, chance probably plays a role at some point in reaching an exceptional age. But the fact that differences in biomarkers could be observed a long time before death suggests that genes and lifestyle may also play a role.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/215166/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/karin-modig-1473484">Karin Modig</a>, Associate Professor, Epidemiology, <a href="https://theconversation.com/institutions/karolinska-institutet-1250">Karolinska Institutet</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/centenarian-blood-tests-give-hints-of-the-secrets-to-longevity-215166">original article</a>.</em></p>

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Should we still be using RATs to test for COVID? 4 key questions answered

<p><em><a href="https://theconversation.com/profiles/hassan-vally-202904">Hassan Vally</a>, <a href="https://theconversation.com/institutions/deakin-university-757">Deakin University</a></em></p> <p>We’re currently navigating <a href="https://www.thenewdaily.com.au/life/health/2023/11/15/covid-australia-eighth-wave">an eighth wave</a> of <a href="https://theconversation.com/were-in-a-new-covid-wave-what-can-we-expect-this-time-216820">COVID infections</a> in Australia. However the threat COVID poses to us is significantly less than it has ever been, thanks to immunity we’ve acquired through <a href="https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(22)00801-5/fulltext">a combination</a> of prior infection and vaccination.</p> <p>That said, COVID is by no means behind us. The threat of severe illness remains higher for many people, and we’re all potentially at risk of developing <a href="https://www.health.gov.au/topics/covid-19/long-covid">long COVID</a>.</p> <p>While many people appear to be doing fewer rapid antigen tests (RATs) than they used to – if any at all – with rising cases, and as we head towards the festive season, testing continues to be important.</p> <p>So what do you need to know about testing in this wave? Here are four key questions answered.</p> <h2>1. When should I do a RAT?</h2> <p>There are a few situations where determining your COVID status is important to inform your actions, particularly during an uptick in infections. With more circulating virus, your index of suspicion that you have COVID if you’re experiencing cold-like symptoms should be higher.</p> <p>RATs work best when they’re used to confirm whether you have COVID when you <a href="https://www.tga.gov.au/products/covid-19/covid-19-tests/how-testing-works-covid-19">have respiratory symptoms</a> and are infectious. So the primary use of RATs should be to determine your COVID status when you’re sick. A positive test should prompt you to isolate, and if you’re eligible, to seek antivirals.</p> <p>Testing might also be worthwhile if you’ve come into contact with someone with COVID but you haven’t developed symptoms. If you find you have in fact contracted the virus, you can take steps to avoid spreading it to other people (you can infect others even <a href="https://www.healthline.com/health/what-is-asymptomatic-covid#prevalence">when you’re asymptomatic</a>). This is especially important if you’re going to be socialising in large groups or in contact with people who are vulnerable.</p> <p>Another situation in which to consider testing, particularly at this time of year, is before attending large social gatherings. While the reliability of a RAT is never perfect, do the test as close to the event as possible, because your disease status <a href="https://www.businessinsider.com/omicron-rapid-test-hour-before-party-not-day-before-expert-2021-12">can change quickly</a>.</p> <h2>2. Should I test multiple times?</h2> <p>Yes. RATs are not as sensitive as PCR tests, which is the trade-off we make for being able to do this test at home and <a href="https://www.wsj.com/articles/public-health-officials-pursue-covid-19-tests-that-trade-precision-for-speed-11599562800">getting a rapid result</a>.</p> <p>This means that while if you test positive with a RAT you can be very confident you have COVID, if you test negative, you cannot be as confident that you don’t have COVID. That is, the test may give you a false negative result.</p> <p>Although RATs from different manufacturers have different accuracies, all RATs approved by Australia’s Therapeutic Goods Administration must have a sensitivity of <a href="https://www.tga.gov.au/products/covid-19/covid-19-tests/covid-19-rapid-antigen-self-tests-home-use/covid-19-rapid-antigen-self-tests-are-approved-australia#:%7E:text=For%20rapid%20antigen%20tests%2C%20this,specificity%20of%20at%20least%2098%25.">at least 80%</a>.</p> <p>The way to increase your confidence in a negative result is to do multiple RATs serially – each negative test increases the confidence you can have that you don’t have COVID. If you have symptoms and have tested negative after your first RAT, <a href="https://www.fda.gov/medical-devices/safety-communications/home-covid-19-antigen-tests-take-steps-reduce-your-risk-false-negative-results-fda-safety">the advice</a> is to repeat the test after 48 hours, and potentially a third time after another 48 hours if the second test is also negative.</p> <h2>3. Do RATs detect the latest variants?</h2> <p>Since RATs <a href="https://www.healthdirect.gov.au/covid-19/testing#:%7E:text=Rapid%20antigen%20tests%2C%20or%20RATs,of%20proteins%20of%20the%20virus.">detect particular surface proteins</a> on SARS-CoV-2 (the virus that causes COVID), it’s theoretically possible that as the virus evolves, the reliability of these tests may be affected.</p> <p>However, RATs were designed to detect a part of the virus that is not as likely to mutate, so the hope is these tests <a href="https://www.health.com/do-covid-tests-work-new-variants-7967102">will continue to hold up</a> as SARS-CoV-2 evolves.</p> <p>The performance of RATs is continually being assessed by manufacturers. So far, there’s been no change reported in the ability of these tests to <a href="https://www.ama.com.au/articles/tga-updated-advice-rats-nearing-expiry-and-rats-efficacy-current-strains#:%7E:text=The%20TGA%20has%20received%20evidence,19%20RAT%20post%2Dmarket%20review.">detect the latest variants</a>.</p> <h2>4. Can I rely on expired RATs?</h2> <p>At this point in the pandemic, you might have a few expired tests at the back of your cupboard.</p> <p>Technically the most appropriate advice is to say you should never use a diagnostic test <a href="https://www.tga.gov.au/products/covid-19/covid-19-tests/covid-19-rapid-antigen-self-tests-home-use/covid-19-rapid-antigen-self-tests-are-approved-australia">past its expiry date</a>. As a general principle the performance of a test cannot be guaranteed beyond this date. The risk is that over time the components of the RAT degrade and if you use a test that’s not working optimally, it’s more likely to indicate <a href="https://www.health.com/can-you-use-expired-covid-test-6827970">you don’t have COVID</a> when you actually do, which may have consequences.</p> <p>However, as for all things COVID, the answer is not so black and white. Since these tests were new when they were introduced earlier in the pandemic, manufacturers didn’t have specific data on their performance over time, and so the expiry dates given were necessarily conservative.</p> <p>It’s likely these tests will work beyond the expiry dates on the packet, but just how long and how well they work is a bit of an unknown, so we need to be cautious.</p> <p>The other thing to consider is ensuring you store RATs correctly. Storage instructions should be found on the packet, but the key issue is making sure they’re not exposed to extreme temperatures. In particular, <a href="https://7news.com.au/lifestyle/health-wellbeing/how-to-properly-store-your-at-home-covid-19-rapid-antigen-tests-c-5465412">high temperatures</a> may damage the chemicals in the test which may reduce its sensitivity.</p> <h2>The path from here</h2> <p>Regular upticks in COVID cases are something we’re going to have to get used to. At these times, we should all be a bit more cautious about looking after ourselves and others as we go about our lives. What this looks like will vary for different people depending on their personal circumstances.</p> <p>However, being up to date with <a href="https://theconversation.com/what-are-the-new-covid-booster-vaccines-can-i-get-one-do-they-work-are-they-safe-217804">booster vaccinations</a>, having a plan for <a href="https://www.health.gov.au/topics/covid-19/oral-treatments">accessing antivirals</a> if you’re eligible, <a href="https://theconversation.com/with-covid-surging-should-i-wear-a-mask-217902">wearing masks</a> in high-risk settings and testing all continue to play an important role in responding to COVID.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/218016/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/hassan-vally-202904"><em>Hassan Vally</em></a><em>, Associate Professor, Epidemiology, <a href="https://theconversation.com/institutions/deakin-university-757">Deakin University</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/should-we-still-be-using-rats-to-test-for-covid-4-key-questions-answered-218016">original article</a>.</em></p>

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Worried about getting a blood test? 5 tips to make them easier (and still accurate)

<p><em><a href="https://theconversation.com/profiles/sapha-shibeeb-1481231">Sapha Shibeeb</a>, <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p>Blood tests are a common medical procedure, offering valuable insights into a person’s health. Whether you’re getting a routine check-up, diagnosing a medical condition or monitoring treatment progress, understanding the process can make the experience more comfortable and effective.</p> <p>For the majority of patients, blood collections are a minor inconvenience. Others may feel <a href="https://www.sciencedirect.com/science/article/abs/pii/S0887618506000041">uneasy and anxious</a>.</p> <p>Preparation strategies can help get you through the procedure.</p> <h2>How blood is collected</h2> <p>During venipuncture (blood draw), the phlebotomist (blood collector) inserts a needle through the skin into a vein and a small amount of blood is collected and transferred into a test tube.</p> <p>Tubes are sent to a laboratory, where the blood is analysed. A laboratory technician may count or examine cells and measure the levels of minerals/salts, enzymes, proteins or other substances in the sample. For some tests, blood plasma is separated out by spinning (centrifuging) the sample. Others pass a light beam through the sample to determine the amount of a chemical present.</p> <p>For collection, the phlebotomist usually selects a vein in the crook of your elbow, where veins are readily accessible. Blood can also be drawn from veins in the wrists, fingers or heels. A tourniquet may be applied to restrict blood flow and make the chosen vein puff out.</p> <h2>Different tests require different preparation</h2> <p>Before a blood test, the GP or health-care provider will give you specific instructions.</p> <p>These may include fasting for up to 12 hours or temporarily discontinuing certain medications.</p> <p>It is crucial to follow these guidelines meticulously as they can significantly impact the accuracy of your test results. For example, fasting is required before glucose (blood sugar) and lipids (blood fats) testing because blood sugar and cholesterol levels typically increase after a meal.</p> <p>If the blood test requires fasting, you will be asked not to eat or drink (no tea, coffee, juice or alcohol) for about eight to 12 hours. Water is allowed but smoking should be avoided because it can increase <a href="https://diabetesjournals.org/care/article/19/2/112/19825/Acute-Effect-of-Cigarette-Smoking-on-Glucose">blood sugar, cholesterol and triglyceride levels</a>.</p> <p>Generally, you will be asked to fast overnight and have the blood collection done in the morning. Fasting for longer than 15 hours could impact your results, too, by causing dehydration or the release of certain chemicals in the blood.</p> <p>If you have diabetes, you must consult your doctor prior to fasting because it can increase the risk of hypoglycemia (low blood sugar) in people with type 1 diabetes. Most type 2 diabetics can safely fast before a blood test but there are some exceptions, such as people who are taking certain medications including insulin.</p> <h2>5 tips for a better blood test</h2> <p>To improve your blood collection experience, consider these tips:</p> <p><strong>1. Hydrate</strong></p> <p>Drink plenty of water right up to 30 minutes before your appointment. Adequate hydration improves blood flow, making your veins more accessible. Avoid <a href="https://academic.oup.com/labmed/article/34/10/736/2657269">strenuous exercise</a> before your blood test, which can increase some blood parameters (such as liver function) while decreasing others (such as sodium).</p> <p><strong>2. Loose clothing</strong></p> <p>Wear clothing that allows easy access to your arms to ensure a less stressful procedure.</p> <p><strong>3. Manage anxiety</strong></p> <p>If the sight of blood or the procedure makes you anxious, look away while the needle is inserted and try to keep breathing normally. Distraction can help – virtual reality has been <a href="https://pubmed.ncbi.nlm.nih.gov/31889358/">trialled</a> to reduce needle anxiety in children. You could try bringing something to read or music to listen to.</p> <p><strong>4. Know your risk of fainting</strong></p> <p>If you’re prone to fainting, make sure to inform the phlebotomist when you arrive. You can have your blood drawn while lying down to minimise the risk of passing out and injury. Hydration helps maintain blood pressure and can also <a href="https://www.ahajournals.org/doi/10.1161/01.CIR.0000101966.24899.CB">reduce the risk</a> of fainting.</p> <p><strong>5. Discuss difficult veins</strong></p> <p>Some people have smaller or scarred veins, often due to repeated punctures, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4989034/">chemotherapy</a> or blood thinner use. In such cases, venipuncture may require multiple attempts. It is important to talk to the phlebotomist if you feel discomfort or significant pain. A finger prick can be performed as an alternative for some tests, such as blood glucose levels. But other comprehensive tests require larger blood volume.</p> <h2>Blood draws after lymph node removal</h2> <p>Historically, there were concerns about drawing blood from an arm that had undergone lymph node removal. This was due to the risk of <a href="https://www.cancer.gov/about-cancer/treatment/side-effects/lymphedema/lymphedema-pdq#:%7E:text=Lymphedema%20is%20the%20build%2Dup,the%20way%20that%20it%20should.">lymphedema</a>, a condition marked by fluid build-up in the affected arm. Lymph nodes may have been removed (<a href="https://www.ncbi.nlm.nih.gov/books/NBK564397/#:%7E:text=Lymph%20node%20dissection%2C%20also%20known,surgical%20management%20of%20malignant%20tumors.">lymphadenectomy</a>) for cancer diagnosis or treatment.</p> <p>However, a <a href="https://ascopubs.org/doi/10.1200/JCO.2015.61.5948">2016 study</a> showed people who’ve had lymph nodes removed are not at a higher risk of developing lymphedema following blood draws, even when drawing blood from the affected arm.</p> <h2>After your blood test</h2> <p>The whole blood test procedure usually lasts no more than a few minutes. Afterwards, you may be asked to apply gentle pressure over a clean dressing to aid clotting and reduce swelling.</p> <p>If you do experience swelling, bruising or pain after a test, follow general first aid procedures to alleviate discomfort. These include applying ice to the site, resting the affected arm and, if needed, taking a pain killer.</p> <p>It is usually recommended you do not do heavy lifting for a few hours after a blood draw. This is to prevent surges in blood flow that could prevent clotting where the blood was taken.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/216073/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><em><a href="https://theconversation.com/profiles/sapha-shibeeb-1481231">Sapha Shibeeb</a>, Senior lecturer in Laboratory Medicine , <a href="https://theconversation.com/institutions/rmit-university-1063">RMIT University</a></em></p> <p><em>Image credits: Shutterstock</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/worried-about-getting-a-blood-test-5-tips-to-make-them-easier-and-still-accurate-216073">original article</a>.</em></p>

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"Ice in his veins": Stunning result in First Ashes Test

<p>Australia has emerged victorious in the first Ashes Test, with captain Pat Cummins chasing down 281 with just two wickets left inside the final five overs on the last day at Edgbaston.</p> <p>Cummins scored an unbeaten 44 as he and Nathan Lyon (16) put on 55 for the ninth wicket to bag the win — a thrilling reversal of Australia’s famous two-run loss at the same ground in 2005.</p> <p>The captain and Lyon hit occasional boundaries, wearing several short balls on the body before Cummins got a thick edge to third man off Robinson and Harry Brook’s fumble on the boundary saw Aussie fans and players erupt in raptures — reigning in a 1-0 lead in the series.</p> <p>"Ice in his veins," England great Michael Atherton said in commentary when Cummins' boundary sealed the result.</p> <p>"Pat Cummins has led his side to a famous victory here at Edgbaston.</p> <p>"Seventy-two they needed when he came to the crease and he has got his team over the line.”</p> <p>Aussie cricket legend Ricky Ponting was astounded.</p> <p>"What an end to a Test match, what a game of cricket," the former captain said.</p> <p>Needing 174 runs to win at the start of the day, in-form opener Usman Khawaja laid a platform for the late charge with 65 off 197 balls, before being bowled late in the day.</p> <p>He admitted he was “Sh****ng [himself]” as he watched the rest of the brutal run chase from the sheds.</p> <p>Despite being confined to a knee brace, Ben Strokes brought himself on to bowl and claimed the wicket of the eventual man of the match, Usman Khawaja.</p> <p>As the Aussie dressing room spiralled into a frenzy, an elated Cummins raced over to Lyon at the opposite end of the wicket and lifted his batting partner off the ground.</p> <p>The pair were then seen in a triumphant embrace as ecstatic Aussies in the Birmingham crowd celebrated the incredible result.</p> <p>The victory — initially appearing highly unlikely when Lyon joined Cummins with the visitors needing 54 runs to win — made for Australia’s highest successful run chase against England since 1948.</p> <p><em>Image credit: Getty</em></p>

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Put your Star Wars knowledge to the test

<p>While May 4 is not a public holiday, for passionate Star Wars fans around the world, it may as well be. </p> <p>Whether you prefer to dress-up with friends and celebrate with a mega movie marathon - after hours spent deciding which trilogy to begin with, of course - or scroll your favourite forums to find that next snippet of news about any upcoming projects, it’s fun to have the odd fun fact to drop into conversation, whether or not your present company particularly wants to hear it. </p> <p>And now’s the time to put your knowledge to the test, with some<em> Star Wars </em>trivia to challenge and to impress - especially if you get that perfect 15/15. </p> <p>So, “may the Force be with you”, and don’t forget to scroll to the bottom for the answers! </p> <p><strong>1. What was the false working title used to mask production for <em>Star Wars Episode VI: Return of the Jedi </em>in 1982? </strong></p> <p>A: Blue Moon</p> <p>B: Blue Harvest</p> <p>C: Force Squadron</p> <p>D: Galaxy’s Edge</p> <p> </p> <p><strong>2. The term ‘Ewok’ was never said aloud in the original trilogy. </strong></p> <p>A: True</p> <p>B: False</p> <p> </p> <p><strong>3. Who delivered the line “congratulations, you are being rescued” in <em>Rogue One: A Star Wars Story</em>? </strong></p> <p>A: Cassian Andor</p> <p>B: C-3PO</p> <p>C: K-2SO</p> <p>D: Orson Krennic</p> <p> </p> <p><strong>4. How many actresses have portrayed (in the live action films) the leader of the Rebel Alliance, Mon Mothma? </strong></p> <p>A: 4</p> <p>B: 3</p> <p>C: 2</p> <p>D: 1</p> <p> </p> <p><strong>5. Which movie features the most stop-motion animation? </strong></p> <p>A: <em>The Phantom Menace</em></p> <p>B: <em>Empire Strikes Back</em></p> <p>C: <em>Return of the Jedi</em></p> <p>D: <em>A New Hope</em></p> <p> </p> <p><strong>6. Why are porgs so prominent in <em>The Last Jedi</em>? </strong></p> <p>A: Director Rian Johnson was asked by a crew member’s child to include the feathered friends</p> <p>B: The marketing team had requested something small and fuzzy for the younger audience</p> <p>C: Porgs were inspired by early concept art for BB-8 that they didn’t want to toss aside completely</p> <p>D: The island on which they filmed was home to puffins and it was easier just to tie them in </p> <p> </p> <p><strong>7. Yoda shares a voice actor with which iconic Muppet? </strong></p> <p>A: Miss Piggy</p> <p>B: Kermit</p> <p>C: Gonzo </p> <p>D: Swedish Chef</p> <p> </p> <p><strong>8. How many films does the Rebel Alliance’s Blue Squadron appear in? </strong></p> <p>A: 1</p> <p>B: 2</p> <p>C: 3</p> <p>D: 4</p> <p> </p> <p><strong>9. Which phrase can be heard in every Star Wars movie?</strong></p> <p>A: “There’s no such thing as luck.” </p> <p>B: “Rebellions are built on hope.” </p> <p>C: “I have a bad feeling about this.” </p> <p>D: “Never underestimate a droid.” </p> <p> </p> <p><strong>10. In <em>The Phantom Menace</em>, Qui-Gon Jinn used which common household item as his communicator? </strong></p> <p>A: A lint brush</p> <p>B: A torch</p> <p>C: A tin of shoe polish </p> <p>D: A razor</p> <p> </p> <p><strong>11. How many Sith can there be at any one time? </strong></p> <p>A: 8</p> <p>B: 6</p> <p>C: 4</p> <p>D: 2</p> <p> </p> <p><strong>12. What was Luke Skywalker originally going to be called? </strong></p> <p>A: Luke Stardestroyer</p> <p>B: Luke Starkiller</p> <p>C: Luke Skykiller</p> <p>D: Luke Lars</p> <p> </p> <p><strong>13. The noise from passing which object served as the inspiration for lightsaber sounds? </strong></p> <p>A: A radio</p> <p>B: A microwave</p> <p>C: A television </p> <p>D: A racecar</p> <p> </p> <p><strong>14. Which quote is correct?</strong></p> <p>A: “No, I am your father.”</p> <p>B: “Luke, I am your father.” </p> <p> </p> <p><strong>15. Who built C-3PO? </strong></p> <p>A: Luke Skywalker</p> <p>B: Jar Jar Binks</p> <p>C: Shmi Skywalker</p> <p>D: Anakin Skywalker</p> <p> </p> <p><em>Images: Getty</em></p> <p><strong>ANSWERS: </strong></p> <blockquote> <p>1: A, 2: A, 3: C, 4: C, 5: B, 6: D, 7: A, 8: A, 9: C, 10: D, 11: D, 12: B, 13: C, 14: A, 15: D</p> </blockquote>

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00-No: US traveller puts border security to the test with a golden gun

<p>A 28-year-old traveller from the United States has been arrested after Australian Border Force officers allegedly discovered a firearm in her luggage. </p> <p>According to a report on the ABF website, the weapon - a 24-carat gold-plated handgun - was unregistered, and the passenger was not in possession of “a permit to import or possess the firearm in Australia.”</p> <p>If convicted, she will face up to 10 years of imprisonment. And while she was arrested and charged, she was released on bail at Downing Centre Local Court, and is expected to face court again in a month’s time. She remains subject to visa cancellation, and faces the likelihood of being removed from Australia. </p> <p>As ABF Enforcement and Detained Goods East Commander Justin Bathurst explained, the discovery was made with a combination of ABC officer skills and detection technology, one that served to prevent a dangerous weapon from entering the Australian community. </p> <p>“Time and time again, we have seen just how good ABF officers are at targeting and stopping illegal, and highly dangerous, goods from crossing Australia's border," he said.</p> <p>“The ABF is Australia's first and most important line of defence. ABF officers are committed to protecting our community by working with law enforcement partners to prevent items like unregistered firearms getting through at the border."</p> <p>Photos distributed by the ABF present the image of the gun in its case, as well as a scan of the passenger’s luggage, with the gun clearly visible among the rest of her possessions. </p> <p>While travellers on domestic flights within the United States are able to carry firearms in their checked luggage - granted they are unloaded and securely locked away, and the proper authorities have been informed - Australia has much stricter laws surrounding firearms. </p> <p>In the wake of a 1996 Tasmanian tragedy, in which 35 people lost their lives to a gunman, all automatic and semi-automatic weapons were outlawed in the country. Meanwhile, in the United States, a frightening sum of 6,301 were confiscated at checkpoints as of December 2022, according to the Transportation Security Administration.</p> <p>For many, the news was broken on social media, with comments sections reflecting the shock - and disapproval - of the masses, with the occasional 007 reference thrown in. </p> <p>“Smuggling firearms into Australia is a serious offence,” wrote one on Twitter, “and should be met with the full force of the law as it endangers citizen safety.”</p> <p>“That’s a fantastic bit of security work by our airport staff,” someone commended. </p> <p>Another had one very important question, asking “how did she get it out of the US to begin with...??? TSA should have caught that at the airport before she even left. Even if it was in a checked bag, it still had to be declared.”</p> <p><em>Images: Australian Border Force</em></p>

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Madeleine McCann's parents speak out after DNA test results

<p>Madeleine McCann's parents have spoken out after the results of Julia Faustyna's DNA test have returned. </p> <p>Julia Faustyna, a 21-year-old Polish woman, has been claiming to be the missing British child in a high-profile campaign that has seen her undergo a DNA test to prove her identity.</p> <p>The DNA results determined that Julia is not Maddie, despite Julia's claims of having similar facial features, suffering an abusive childhood and had starting to question her parentage as a result. </p> <p>Private detective Dr Fia Johansson arranged for Julia to give samples in the US for extensive DNA tests - including a DNA test similar to a 23andMe test, which established she is not Madeleine.</p> <p>The test looked into her heritage, and showed that she is from Poland, with some Lithuanian and Romanian heritage, <a href="https://www.thesun.co.uk/news/21808585/who-julia-wendell-madeleine-mccann/" target="_blank" rel="noopener"><em>The Sun</em></a> reported, but nothing to suggest any link to the McCann's. </p> <p>In response, a spokesman for Madeleine’s parents Kate and Gerry McCann said, “There isn’t anything to report at this time. If and when there is, it will come from The Metropolitan Police.”</p> <p>Julia is also facing a nervous wait for the results of further health tests as doctors fear she <a href="https://oversixty.com.au/news/news/sad-health-news-for-woman-claiming-to-be-madeleine-mccann" target="_blank" rel="noopener">may have leukaemia</a>, Dr Johansson - with Julia’s permission - revealed to <em>The Sun</em>.</p> <p>She said, “Her health is very poor she has bad asthma and she suffers lots of pain in her bones."</p> <p>“She is booked in for a CT and MRI scan because of the pain in her bones."</p> <p>“Her blood work is also abnormal so my doctor here in the US is investigating whether she could have leukaemia so we are awaiting the results of that."</p> <p>“And if she needs any treatment we will make sure she gets that.”</p> <p><em>Image credits: Getty Images</em></p>

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Age, not weight, should be the big decider in whether to screen for diabetes

<p><span style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;">Because it’s possible to be diabetic or prediabetic without any symptoms, and early diagnoses lead to better health outcomes, lots of countries have screening programs for diabetes.</span></p> <div class="copy"> <p>In the US, overweight or obese people between 35 and 70 are recommended to regularly get diabetes tests.</p> <p>But <a href="https://www.ajpmonline.org/article/S0749-3797(23)00006-5/fulltext" target="_blank" rel="noreferrer noopener">new research</a> in the <em>American Journal of Preventative Medicine</em> has called this into question, suggesting that screening based purely on age will catch the greatest proportion of diabetic and prediabetic people.</p> <p>“It might sound counterintuitive because we think of being overweight or obese as the primary cause of diabetes,” says lead author Dr Matthew O’Brien, an associate professor of medicine at Northwestern University Feinberg School of Medicine, US.</p> <p>“But if we make decisions about diabetes testing based on weight, we will miss some people from racial and ethnic minority groups who are developing prediabetes and diabetes at lower weights.”</p> <p>The researchers examined data from all the 2021 diabetes screenings recommended by the US Preventive Services Task Force. Based on this data, they recommend screening every US adult aged between 35 and 70.</p> <p>“All major racial and ethnic minority groups develop diabetes at lower weights than white adults, and it’s most pronounced for Asian Americans,” says O’Brien.</p> <p>Roughly half of US adults have Type 2 diabetes or prediabetes, and 81% of adults with prediabetes don’t know they have it. Diagnoses are delayed in ethnic minorities, compared to white people.</p> <p>“Diabetes is a condition in which unacceptable racial and ethnic disparities persist,” says O’Brien.</p> <p>“That’s why we need a screening approach that maximises equity. If we can find everyone earlier, it helps us reduce these disparities and the bad outcomes that follow.”</p> <p>The researchers also found that it might be beneficial for members of some ethnic minorities to receive earlier screening, but they don’t formally recommend it.</p> <p>“It’s imperative that we identify a screening approach that is equitable across the entire US population,” says O’Brien.</p> <p>“Our findings illustrate that screening all adults aged 35 to 70 years, regardless of weight or body mass index, performs equitably across all racial and ethnic groups.”</p> <p>This age cut-off also makes it much simpler for clinicians to decide whether someone should get a diabetes test.</p> <p>“There are many ways to nudge patients and providers to complete this testing, which should be the focus of future research,” says O’Brien.</p> <p>In Australia, diabetes tests are recommended based on a <a href="https://www.healthdirect.gov.au/diabetes-screening-tests" target="_blank" rel="noreferrer noopener">range of risk factors</a>, including age, waist measurement, ethnicity, physical activity and family history. Diabetes Australia has a <a href="https://www.diabetesaustralia.com.au/risk-calculator/" target="_blank" rel="noreferrer noopener">risk calculator</a> with which you can determine your own risk.</p> <p><!-- Start of tracking content syndication. Please do not remove this section as it allows us to keep track of republished articles --> <img id="cosmos-post-tracker" style="opacity: 0; height: 1px!important; width: 1px!important; border: 0!important; position: absolute!important; z-index: -1!important;" src="https://syndication.cosmosmagazine.com/?id=240911&amp;title=Age%2C+not+weight%2C+should+be+the+big+decider+in+whether+to+screen+for+diabetes" width="1" height="1" data-spai-target="src" data-spai-orig="" data-spai-exclude="nocdn" /></div> <div id="contributors"> <p><em>This article was originally published on <a href="https://cosmosmagazine.com/health/diabetes-tests-screening-age-weight/" target="_blank" rel="noopener">cosmosmagazine.com</a> and was written by <a href="https://cosmosmagazine.com/contributor/ellen-phiddian">Ellen Phiddian</a>. </em></p> <p><em>Images: Shutterstock</em></p> </div>

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Hilarious footage emerges of Sam Neill's James Bond screen test

<p dir="ltr"><em>Jurassic Park</em> star Sam Neill appeared on the <em>Today</em> show to discuss his career and new memoir 'Did I Ever Tell You This?' but the hosts had other plans.</p> <p dir="ltr">Karl Stefanovic, Sarah Abo and Brooke Boney managed to dig up an old screen test that left the 75-year-old red-faced.</p> <p dir="ltr">"Oh, my God, no - That is so cruel to play that, so cruel," a flustered Neil said, as footage from his <em>James Bond</em> audition started rolling.</p> <p dir="ltr">In the video, a young Neill armed with a gun and donning an unbuttoned shirt bursts into a bedroom-to the surprise of a naked woman- and says the famous line "My friends called me Bond, James Bond".</p> <p dir="ltr">Neill said he was thankful that he didn’t get the part and that someone else was chosen to do the role.</p> <p dir="ltr">"I felt so awkward all day that we made that thing and it just went on and on and on," he said.</p> <p dir="ltr">"I am so relieved they offered it to someone else, they are welcome to it - you don't want to be the Bond that no-one likes, you know - that is a fate worse than death."</p> <p dir="ltr">Although he didn’t get the role of agent 007, the actor has starred in three of the J<em>urassic Park films, Event Horizon, The Dish and Peter Rabbit</em>.</p> <p dir="ltr">He also told the <em>Today </em>show hosts that he never intended on becoming a professional actor and his success was completely unexpected.</p> <p dir="ltr">"I never really imagined I would have a career in film, let alone a career as an actor," he said.</p> <p dir="ltr">"At the rather advanced age of 30 I suddenly realised I could make a living at what I loved best and I never looked back until I wrote (the memoir) and it has been good to look back - it has been really good for me."</p> <p><em>Image: Today Show, Channel 9</em></p>

Movies

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Lie detection tests have worked the same way for 3,000 years – and they’re still hopelessly inaccurate

<p>Popular culture is fascinated with the ability to detect liars. Lie detector tests are a staple of police dramas, and TV shows such as Poker Face feature “human polygraphs” who detect deception by picking up tell-tale signs in people’s behaviour.</p> <p>Records of attempts to detect lies, whether by technical means or by skilled observers, go back at least 3,000 years. Forensic science lie detection techniques have become <a href="https://onlinelibrary.wiley.com/doi/10.1111/j.1541-1338.2005.00166.x">increasingly popular</a> since the invention of the polygraph early in the 20th century, with the latest methods involving advanced brain imaging.</p> <p>Proponents of lie detection technology sometimes <a href="https://www.press.umich.edu/3091709/lying_brain">make grandiose claims</a>, such as a <a href="https://doi.org/10.1007/s11896-022-09566-y">recent paper</a> that said “with the help of forensic science and its new techniques, crimes can be easily solved”.</p> <p>Despite these claims, an infallible lie detection method has yet to be found. In fact, most lie detection methods don’t detect lies at all – instead, they register the physiological or behaviour signs of stress or fear.</p> <h2>From dry rice to red-hot irons</h2> <p>The <a href="https://journals.sagepub.com/doi/10.1177/1529100610390861">earliest recorded lie detection method</a> was used in China, around 1000 BC. It involved suspects placing rice in their mouths then spitting it out: wet rice indicated innocence, while dry rice meant guilty.</p> <p>In India, around 900 BC, <a href="http://scholarlycommons.law.northwestern.edu/cgi/viewcontent.cgi?article=2844&amp;context=jclc">one method</a> used to detect poisoners was observations of shaking. In ancient Greece a rapid pulse rate was taken to indicate deceit.</p> <p>The Middle Ages saw barbaric forms of lie detection used in Europe, such as the red-hot iron method which involved suspected criminals placing their tongue, often multiple times, on a red-hot iron. Here, a burnt tongue indicated guilt.</p> <h2>What the polygraph measures</h2> <p>Historical lie detection methods were based in superstition or religion. However, in the early 20th century a purportedly scientific, objective, lie detection machine was invented: the polygraph.</p> <p>The <a href="https://www.ojp.gov/pdffiles1/nij/grants/228091.pdf">polygraph measures</a> a person’s respiration, heart rate, blood pressure, and skin conductance (sweating) during questioning.</p> <p>Usually a “control question” about a crime is asked, such as “Did you do it?” The person’s response to the control question is then compared to responses to neutral or less provocative questions. Heightened reactions to direct crime questions are taken to indicate guilt on the test.</p> <h2>The overconfidence of law enforcers</h2> <p>Some law enforcement experts claim they don’t even need a polygraph. They can detect lies simply by observing the behaviour of a suspect during questioning.</p> <p>Worldwide research shows that law enforcers are often <a href="https://doi.org/10.5093/apj2022a4">confident they can detect lying</a>. Many assume a suspect’s nonverbal behaviour reveals deceit.</p> <p>A <a href="https://www.emerald.com/insight/content/doi/10.1108/14636641111134314/full/html">2011 study with Queensland police</a> revealed many officers were confident they could detect lying. Most favoured a focus on nonverbal behaviour even over available evidence.</p> <p>However, <a href="https://link.springer.com/chapter/10.1007/978-3-319-96334-1_3">research shows</a> that law enforcers, despite their confidence, are often not very good at detecting lying.</p> <p>Law enforcement officers are not alone in thinking they can spot a liar. <a href="https://journals.sagepub.com/doi/10.1177/0022022105282295">Global studies</a> have found that people around the world believe lying is accompanied by specific nonverbal behaviours such as gaze aversion and nervousness.</p> <h2>What’s really being tested</h2> <p>Many historical and current lie detection methods seem underpinned by the plausible idea that liars will be nervous and display observable physical reactions.</p> <p>These might be shaking (such as in the ancient Indian test for poisoners, and the nonverbal behaviour method used by some investigators), a dry mouth (the rice-chewing test and the hot-iron method), increased pulse rate (the ancient Greek method and the modern polygraph), or overall heightened physiological reactions (the polygraph).</p> <p>However, there are two major problems with using behaviour based on fear or stress to detect lying.</p> <p>The first problem: how does one distinguish fearful innocents from fearful guilty people? It is likely that an innocent person accused of a crime will be fearful or anxious, while a guilty suspect may not be.</p> <p>This is borne out with the polygraph’s <a href="https://nap.nationalacademies.org/read/10420/chapter/10#218">high false-positive rate</a>, meaning innocent people are deemed guilty. Similarly, some police have assumed that <a href="https://cqu-primo.hosted.exlibrisgroup.com/permalink/f/1rb43gr/TN_cdi_informaworld_taylorfrancisbooks_9781843926337">innocent, nervous suspects were guilty</a> based on inaccurate interpretations of behavioural observations.</p> <p>The second major problem with lie detection methods based on nervous behaviour is there is <a href="https://journals.copmadrid.org/apj/art/apj2019a9">no evidence</a> that specific nonverbal behaviours reliably accompany deception.</p> <h2>Miscarriages of justice</h2> <p>Despite what we know about the inaccuracy of polygraph tests, they haven’t gone away.</p> <p>In the US, they are still used in some police interrogations and <a href="https://www.wired.com/story/inside-polygraph-job-screening-black-mirror/">high-security job interviews</a>. In the UK, lie detector tests are used for <a href="https://www.gov.uk/government/publications/domestic-abuse-bill-2020-factsheets/mandatory-polygraph-tests-factsheet">some sex offenders on probation</a>. And in China, the use of polygraphs in law enforcement may <a href="https://www.sciencedirect.com/science/article/abs/pii/S0031938414005964?via%3Dihub">even be increasing</a>.</p> <p>Australia has been less enthusiastic in adopting lie-detection machines. In New South Wales, the use of lie-detector findings was barred from court in 1983, and an attempt to present polygraph evidence to a court in Western Australia in 2003 <a href="https://www.tandfonline.com/doi/abs/10.1375/pplt.2004.11.2.359">also failed</a>.</p> <p>Many historical and current lie detection methods emulate each other and are based on the same assumptions. Often the <a href="https://muse.jhu.edu/book/13865">only difference</a> is the which part of the body or physical reaction they focus on.</p> <p>Using fallible lie detection methods <a href="https://journals.copmadrid.org/apj/art/apj2022a4">contributes to wrongful convictions</a> and miscarriages of justice.</p> <p>Therefore, it is important that criminal-justice practitioners are educated about fallacious lie detection methods, and any new technique grounded in fear or stress-based reactions should be rejected.</p> <p>Despite outward appearances of technological advancement, over many millennia little has changed. Fearful innocents remain vulnerable to wrongful assumptions of guilt, which is good news for the fearless guilty.</p> <p><em>This article originally appeared on <a href="https://theconversation.com/lie-detection-tests-have-worked-the-same-way-for-3-000-years-and-theyre-still-hopelessly-inaccurate-200741" target="_blank" rel="noopener">The Conversation</a>.</em></p> <p><em>Images: Getty</em></p>

Technology

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Julia Faustyna takes DNA test to prove wild identity claims

<p>Julia Faustyna, the Polish woman who is convinced she is the missing Madeleine McCann, has reportedly taken a DNA test to prove her claim.</p> <p>However, in a stunning twist to the tale, Faustyna’s private investigation with spokesperson Dr Fia Johansson has led the young woman to consider the possibility that she may actually be another missing child - Livia Schepp, who went missing with her twin sister in Switzerland in 2011. </p> <p>“I’ve spoken to her about this and she is open to the fact she could be any missing child out there,” Dr Johansson said while speaking to <em>The Sun</em>. “Not just Madeleine. Julia wants to know the truth about who she is.” </p> <p>While Faustyna’s main argument has involved the physical similarities between herself and Madeleine McCann, one of the pivotal points in her story is how she recognised a suspect from McCann’s case - a man she has named as her own abuser. </p> <p>“One of the reasons she made the connection to Madeleine is because one of the suspects in Madeleine’s case looks very much like a man who she says abused her as a child,” Dr Johansson explained. “But the same man could be connected to Madeleine and other missing children, this is how predators and traffickers work.”</p> <p>“Julia has taken a DNA test,” she confirmed, “and we are investigating if it’s possible to check her DNA with that of [the] missing Livia. We are investigating all possibilities at this stage.” </p> <p>Livia Schepp - and her twin sister Alessia - went missing when they were six, after their father abducted them from Switzerland in 2011. Days later, he took his own life in Italy, and when police discovered the body, the twins were nowhere to be seen. </p> <p>Faustyna, who claims to have post-traumatic amnesia due to sexual abuse in her childhood, lacks clear recollection of her formative years, and has stated while she can recall holidays, she doesn’t “recall my mother being there, for example, or my stepfather, much less my dad.”</p> <p>Whether or not any of Faustyna’s theories are true, the public will have to keep speculating, as no results have yet been shared. </p> <p>However, Faustyna’s viral “@iammadeleinemccan”, where she was sharing updates and side-by-side comparisons with her followers, has since been deleted from the platform. </p> <p>The removal coincides with reports of the DNA test, and after Faustyna closed both her Facebook and Tiktok accounts, disputing her parent’s claim that she was only in this for attention when she said “if you don’t like me, please unfollow. I don’t want fans or followers.”</p> <p><em>Images: Instagram, Twitter</em></p>

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Is my RAT actually working? How to tell if your COVID test can detect Omicron

<p>You’ve tested negative for COVID using a rapid antigen test (RAT), but are a close contact of a positive family member and have symptoms. So you might be wondering if you’re really COVID-negative or if the test is working as well as it should.</p> <p>There are many reasons why your RAT may not give you <a href="https://theconversation.com/15-things-not-to-do-when-using-a-rapid-antigen-test-from-storing-in-the-freezer-to-sampling-snot-176364">the results</a> <a href="https://theconversation.com/my-rats-are-negative-but-i-still-think-i-might-have-covid-should-i-get-a-pcr-test-194527">you expect</a>. But one factor is whether RATs can detect the Omicron variant of SARS-CoV-2 (the virus that causes COVID).</p> <p>We know the virus has mutated during the pandemic. So health authorities and researchers are investigating whether RATs can still detect the <a href="https://www.who.int/activities/tracking-SARS-CoV-2-variants">more recent versions</a> of the virus.</p> <p>The good news is, based on the <a href="https://www.tga.gov.au/sites/default/files/2022-10/post-market-review-of-antigen-and-rapid-antigen-tests-table.pdf">limited data released</a>, all RATs meant for use at home in Australia that have been independently tested so far seem to be able to detect Omicron. The bad news is that not all RATs have been independently tested yet. Yours might be one of those.</p> <h2>What do mutations have to do with RATs?</h2> <p>RATs diagnose COVID infection by detecting specific viral proteins. So there are concerns that as the virus evolves and produces altered viral proteins, this may affect the tests’ ability to diagnose COVID as well as they detected previous variants.</p> <p>Whether RATs can adequately detect Omicron has been raised by authorities and researchers in various countries including <a href="https://www.bmj.com/content/378/bmj-2022-071215">The Netherlands</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/35458384/">Belgium</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/36339133/">Chile</a>, as well as Australia.</p> <p>One <a href="https://journals.asm.org/doi/10.1128/jcm.01097-22">Australian study</a> tested six RATs on Delta, and Omicron lineages BA.4, BA.5 and BA.2.75. The researchers found the kits performed equally well across the different samples at higher viral loads (higher concentrations of the virus), although one kit’s overall sensitivity fell below minimum sensitivity requirements. </p> <p>However, <a href="https://pubmed.ncbi.nlm.nih.gov/36339133/">some international studies</a> have found RATs are less able to detect Omicron, particularly when <a href="https://pubmed.ncbi.nlm.nih.gov/36339133/">viral loads are lower</a>.</p> <h2>So what’s the case in Australia?</h2> <p>Australia’s regulator, the Therapeutic Goods Administration (TGA), initially relied on <a href="https://www.tga.gov.au/products/covid-19/covid-19-tests/post-market-review-antigen-and-rapid-antigen-tests">test data</a> provided by RAT manufacturers to determine the test kit met World Health Organization <a href="https://www.who.int/publications/m/item/technical-specifications-for-selection-of-essential-in-vitro-diagnostics-for-sars-cov-2">standards</a> for acceptable sensitivity (ability to detect a positive case).</p> <p>The TGA also requires manufacturers to send updated test data as new variants arise to demonstrate their test still meets those WHO standards.</p> <p>But the TGA has also commissioned <a href="https://www.tga.gov.au/products/covid-19/covid-19-tests/post-market-review-antigen-and-rapid-antigen-tests">independent testing of RATs</a> to verify how well they detect the more recent COVID variants.</p> <p>They are tested for their ability to detect the wild-type virus (the original strain), the Delta variant, and the Omicron variant. The TGA does not state which specific lineages (descendents) of Omicron are included in the testing. </p> <p>As it completes its analysis on individual tests (or groups of tests), the TGA reports them in a <a href="https://www.tga.gov.au/sites/default/files/2022-10/post-market-review-of-antigen-and-rapid-antigen-tests-table.pdf">table that’s publicly available</a>, which will be updated as more data come in.</p> <h2>What does the table tell us?</h2> <p>You can look up the brand name, manufacturer and batch number of the RAT you have at home. Look for those labelled “self-tests” (more on the different types of tests and their results later).</p> <p>The most important columns in the table are those that indicate whether the kit passed its independent validation. Look for four ticks to indicate the kit meets minimum standards for detecting the original virus, Delta and Omicron variants, and has passed the quality test. A cross indicates is has not passed that component of the validation.</p> <p>Haven’t found a result for your RAT? </p> <p>If a product comes in two versions – a self-test and a type of test used in health-care facilities known as a point-of-care test (POCT in the table) – only one may be tested.</p> <p>If that’s the case, the symbol † means testing was only done on one version and you can use those results for your test. Look for a matching registration number to make sure you’re comparing like with like.</p> <p>The final column indicates what type of data the manufacturer has provided. Some manufacturers have tested the sensitivity of their kits for Omicron lineages BA.4 and BA.5.</p> <h2>What does the table not tell us?</h2> <p>Just because your test has no ticks or crosses against it, this doesn’t mean it can’t detect Omicron. It could be that the independent validation has yet to be completed or uploaded to the table. So the jury is out.</p> <p>The table also does not tell us what lineages of Omicron were tested for, although in some cases the manufacturer has supplied clinical test data. </p> <p>The table data were only current as of October. Seeing as the number of cases of sub-variant infections <a href="https://theconversation.com/what-can-we-expect-from-this-latest-covid-wave-and-how-long-is-it-likely-to-last-194444">has risen since then</a>, so we don’t really know if that is impacting on the sensitivity of even those tests that have recently been validated.</p> <h2>I’ve grappled with the table, now what?</h2> <p>If your brand of RAT has the ticks, particularly for Omicron, it has been assessed has having an acceptable sensitivity. If you are buying a RAT, check the table to see if that brand has been tested for sensitivity to the Omicron variant. </p> <p>If your test has been sitting in a cupboard for months, check the expiry date before you use it. Also consider whether it has been stored at the correct temperature during that time (the instruction leaflet will tell you what that is).</p> <p><em>Image credits: Getty Images</em></p> <p><em>This article originally appeared on <a href="https://theconversation.com/is-my-rat-actually-working-how-to-tell-if-your-covid-test-can-detect-omicron-196210" target="_blank" rel="noopener">The Conversation</a>. </em></p>

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There’s a serious ethical problem with some sunscreen testing methods – and you’re probably not aware of it

<p>As summer approaches, we need to start remembering to slip on sun-protective clothing, slop on sunscreen, slap on a hat, seek shade where possible, and slide on sunglasses.</p> <p>When it comes to sunscreen, we all know we need to wear it to protect against the harmful effects of ultraviolet (UV) radiation, which can cause skin cancer.</p> <p>But what about the sun protection factor, known as the SPF rating, we see on our sunscreen bottles? It indicates the level of protection – but is it always what it says it is, and how is it actually tested?</p> <h2>Risking human health for SPF testing</h2> <p>While there have been some cases of <a href="https://www.tga.gov.au/news/news/sunscreen-testing-ama-laboratories-condition-listing">sunscreens not matching up to their SPF claims</a>, this is the exception and not the norm.</p> <p>In Australia, we can be comfortable knowing these products are tightly regulated to ensure they are safe and meet their claimed SPF rating, according to current SPF testing methods.</p> <p>However, problems arise when it comes to how sunscreens are tested for their SPF rating. Most people would not be aware that the SPF value on their sunscreen bottles is determined by testing on humans.</p> <p>Ultimately, this means we are risking people’s health to test how effective our sunscreens are – and we urgently need to change this.</p> <h2>How is sunscreen SPF tested?</h2> <p>Once a sunscreen formulation has been developed by a manufacturer it needs to go through testing to ensure it only contains approved ingredients, and ultimately, that it does what it says it does.</p> <p>All sunscreen products available in Australia are <a href="https://www.tga.gov.au/news/news/about-sunscreens">tested according to the Australian Standard to determine the SPF</a>. This is great and provides assurance of safety and quality for the consumer – but the problem is with how this testing is done.</p> <p>Currently, testing sunscreens on humans is the approved international standard to rate the UV protection level of a sunscreen. This testing involves volunteers wearing strictly defined amounts of sunscreen and being exposed to artificial solar <a href="https://www.arpansa.gov.au/understanding-radiation/what-is-radiation/non-ionising-radiation/ultraviolet-radiation">UV radiation</a>. </p> <p>Performance is measured by determining the time it takes for erythema or redness to occur. <a href="https://www.cancer.org.au/about-us/policy-and-advocacy/prevention-policy/national-cancer-prevention-policy/skin-cancer-statistics-and-issues/sunburn">This is, basically, sunburn</a>; based on this, an SPF rating is assigned.</p> <h2>Why is human testing of SPF a problem?</h2> <p>If sunscreens only contain approved ingredients we know are safe, is it really a problem they are tested on humans?</p> <p>Sadly, yes. Human testing involves exposing people to harmful UV radiation, which we know can cause skin and eye damage, <a href="https://www.arpansa.gov.au/understanding-radiation/radiation-sources/more-radiation-sources/sun-exposure">as well as being the leading cause of skin cancer</a>. This alone is <a href="https://www.phrp.com.au/wp-content/uploads/2022/03/PHRP3212205.pdf">unethical and unjustifiable</a>.</p> <p>There are also other issues associated with testing sunscreen on humans. For example, the <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/phpp.12095">use of erythema to determine sunscreen effectiveness is highly subjective</a>, and may differ from one person to another, even for those with the same <a href="https://www.arpansa.gov.au/sites/default/files/legacy/pubs/RadiationProtection/FitzpatrickSkinType.pdf">skin type</a>. This makes the reliability of such testing methods questionable.</p> <p>Further, testing is only done on a small number of people (a minimum of <a href="https://www.tga.gov.au/sites/default/files/australian-regulatory-guidelines-for-sunscreens.pdf">ten people is required in Australia</a>). This is great for exposing as few people as possible to harmful UV radiation to determine a product’s SPF rating – but not so great when it comes to inclusiveness.</p> <p>Testing such a small number of people is not representative. It does not include all skin types and leads to real <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/ics.12333">challenges in achieving reproducible results</a> across different laboratories testing the same product.</p> <p>The testing itself is also very expensive. This adds to the already high cost of buying sunscreens, and potentially limits manufacturers from developing new and better products.</p> <p>These, along with many other issues, highlight the urgency for non-human (in vitro) testing methods of a sunscreen’s effectiveness to be developed.</p> <h2>Human-free SPF testing technology is in development</h2> <p>While efforts have been made to develop non-human testing methods, <a href="https://www.sciencedirect.com/science/article/pii/S0165993622002072">there remain several challenges</a>. <a href="https://www.karger.com/Article/Abstract/292777">These include</a> the materials used to simulate human skin (also known as substrates), difficulties in applying the sunscreen to these substrates, reproducibility of results, and ensuring that results are the same as what we see with human testing.</p> <p>However, scientists at <a href="https://www.rmit.edu.au/">RMIT University</a>, with support from the Australian Radiation Protection and Nuclear Safety Agency (<a href="https://www.arpansa.gov.au/">ARPANSA</a>) and the <a href="https://www.cancervic.org.au/">Cancer Council Victoria</a>, are <a href="https://www.sciencedirect.com/science/article/pii/S0165993622002072">working on a solution to this problem</a>.</p> <p>So far, they have developed a prototype sensor that <a href="https://www.nature.com/articles/s41467-018-06273-3">changes colour when exposed to UV radiation</a>. This <a href="https://www.nature.com/articles/s41467-018-06273-3/figures/5">sensor</a> could be customised for human-free sunscreen testing, for example.</p> <p>Reliable in vitro testing methods will mean in the future, sunscreen manufacturers would be able to quickly make and test new and better sunscreens, without being limited by the time and cost constraints involved with human testing.</p> <p>So the next time you buy a bottle of sunscreen, look to purchase the highest-rated sunscreen of SPF 50+ – and know that work is underway on getting that rating classified in a more ethical way.</p> <p><em>Image credits: Getty Images</em></p> <p><em>This article originally appeared on <a href="https://theconversation.com/theres-a-serious-ethical-problem-with-some-sunscreen-testing-methods-and-youre-probably-not-aware-of-it-195359" target="_blank" rel="noopener">The Conversation</a>. </em></p>

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