Victoria has experienced a spike in COVID-19 cases after an outbreak at a meat facility in Melbourne.

Cedar Meats is linked to a total of 45 coronavirus cases and 11 of those have been confirmed as new infections overnight.

The plant has since shut down for extensive cleaning as 300 workers undergo testing for the virus.

The outbreak at the plant also triggered an outbreak at a Sunshine hospital, where dozens of workers were ordered home after a plant worker needed emergency surgery on his thumb and later tested positive to the virus.

Around 152,000 Victorians have been tested for coronavirus, with a total of 1423 cases.

Victorian Treasurer Tim Pallas has stood firm on restrictions not easing until infection rates are under control.

"You will see clusters emerge over time. That's the whole point of tracking and tracing," he said.

"Only when we get to the point that we have confidence that we have the disease under control do we have options.

"Our circumstances, as are other states, are different. We are not at a point where we can start talking about the winding back of arrangements."

Photo credits: 9news