Victorian Deputy CHO Professor Allen Cheng says contact tracers are still searching for the original source of the Smile Buffalo Thai restaurant outbreak.

Fourteen mystery cases have been found in Victoria over the past two weeks, two more than yesterday.

Victoria will introduce a "hard border" with South Australia from midnight, before a permit system is introduced from midnight Saturday.

Victoria records no new coronavirus cases or deaths for an eighth consecutive day.

The Victorian Government says it is monitoring the coronavirus outbreak in South Australia on an hourly basis and has not ruled out the possibility of closing its border if the situation deteriorates.

Victoria records 15 new coronavirus cases and two further deaths overnight, as Melbourne's 14-day rolling average drops slightly to 15.6.

According to COVID-19 modelling released by the Victorian Government today, primary school students are at a "lower risk" than initially thought, there's still a risk of a third wave of infection and the effective reproduction rate is dropping.

Victoria has recorded another day without any new coronavirus cases or deaths, as Melburnians head to beaches, parks and picnics to enjoy a warm and sunny Melbourne Cup Day.

Victoria's Opposition is continuing to mount pressure on the State Government over its handling of COVID-19, calling for a royal commission into the state's pandemic response.

South Australia's "circuit-breaker" lockdown will be stricter than any set of widespread measures imposed during Victoria's second wave. So how will it differ, and is it expected to work?

Melburnians are warned that police will only apply discretion in the most extreme circumstances when enforcing a $4,957 fine on unlawful gatherings announced by the Government on Sunday.

Victoria records seven new coronavirus cases as public health teams try to track an outbreak in Melbourne's northern suburbs.

Metropolitan Melbourne's 14-day daily coronavirus case average has dropped below 50, as the state records 42 new infections overnight.

Victoria reports 51 new coronavirus infections overnight and a further seven deaths.

Victoria reports 41 new coronavirus cases, the state's lowest single-day increase in cases since June. It comes after the State Government unveiled its "roadmap to recovery" outlining four phases Victoria will progress through as restrictions are lifted.

The Australian Medical Association (AMA) says some Victorian hospitals have not met the State Government's deadline for a plan to deal with future coronavirus outbreaks, despite the Health Minister's assurances.

Community legal services representing vulnerable people who have been fined by police for breaching Victoria's stage 4 coronavirus restrictions say the fines are not being waived on appeal despite their clients having legitimate excuses.

The inquiry into Victoria's hotel quarantine program hears the program failed to meet its primary objective — to keep the community safe from the virus — with devastating consequences.

Victoria's two-week rolling average remains at zero after the state again recorded no new coronavirus cases or COVID-19 deaths.

Messages between senior public servants responsible for finding private security firms for Victoria's hotel quarantine program reveal officials were concerned they were dealing with a "cowboy industry".