A healthcare worker who tested positive in South Australia on Monday after flying from Melbourne is suspected of viral shedding, according to Victorian Health Minister Martin Foley.

Along with confirming no new cases or deaths, Foley added the state’s active cases had dropped by one to three.

There were 20,819 tests in the last 24 hours and rolling statewide case average is just 0.1

Melbourne Central and Melbourne Airport have been listed as coronavirus hotspots because of the aged care worker’s positive test.

The woman in her 20s is being treated as infectious by health authorities while in hotel quarantine.

There were no locally acquired coronavirus infections recorded in NSW in the 24 hours to 8:00pm yesterday – the fifth consecutive day no new locally acquired infections have been found in the state. There were five new COVID-19 cases detected in hotel quarantine.

Victoria’s health department has declared the CBD shopping precinct and airport high-risk coronavirus exposure sites.

Anyone who visited Melbourne Central last Sunday between 2pm and 5pm, or were at Melbourne Airport’s Terminal Four from noon to 1pm on Monday, are asked to get tested if symptoms develop.

She previously tested positive for coronavirus in August before being cleared later that month.

Another two positive cases in Victoria are also likely to be viral shedding, but all three remain under investigation.

As Victoria opens up from its lockdown, police will run Operation Compass over the next three weekends to crack down on bad driving behaviour.

Speeding, drink and drug driving, not wearing seatbelts, mobile phone use and fatigue will be targeted as Melburnians head to regional areas for a break.

This will be the first weekend without the “ring of steel” that cut off Melbourne from the rest of the state during the city’s lockdown.

There will also be more police at popular holiday spots.

“While it is fantastic to see people engaging in these recreational activities, we need people to go back to basics and arrive to their destination safely,” said Assistant Commissioner John Fitzpatrick.

“People will be driving both speeds and distances they are unfamiliar with. I urge that drivers do all they can to arrive alive.”

In yet another sign of the state’s virus gains, Tasmania announced it would bring forward its planned reopening to Victoria by several days.

The island state was scheduled to drop its border restrictions with Victoria on December 1 but is now aiming for November 27.

Meanwhile, a fresh poll shows two-thirds of Victorians now believe the time is right for workers to return to COVID-safe offices.

The Roy Morgan survey, released on Wednesday, found 66 per cent of respondents thought office workers should be allowed back on-site, in line with cafe, pub and retail staff.

Unmoved by public opinion, Premier Daniel Andrews declined to set a date for the return of workers into presently deserted office buildings.

Victoria’s virus death toll remains at 819 and the national figure is 907.

-AAP