Victoria has recorded one new local Covid-19 case as New South Wales anxiously waits to hear whether its four-case outbreak has grown further.
The state's Department of Health on Friday found one community case of the virus and one in hotel quarantine overnight from 35,252 test results.
Health authorities in NSW and Canberra meanwhile are on alert after an infected Sydney man in his 40s carrying low levels of the virus visited the ACT on June 14.
The man, from Baulkham Hills in Sydney's north-west, visited the National Gallery of Australia's Boticelli to Van Gogh exhibition and gift shop from 12pm to 1.45pm on Monday.
Anyone who visited the gallery at the same time has been told to get tested and immediately isolate until they receive a negative result.
The same advice applies to anyone who visited Via Dolce Pasticceria, a popular Italian dessert and pizza eatery, on the same day from 2.45-3.15pm.
Victoria has recorded one new local Covid-19 case from 35,252 test results. Pictured is a queue outside a Covid-19 testing site in Melbourne on Wednesday
The alert for Canberra comes as Sydney's Covid exposure list continues to grow, with a popular bowling club and Harris Farm supermarket added on Tuesday night.
New South Wales has seen four new coronavirus cases in the last 48 hours, after a 40-day run without a single locally acquired infection.
Authorities are now scrambling to keep the lid on a potential outbreak, after a driver who transported international flight crew tested positive on Wednesday.
The Bondi man's wife has since also tested positive, as has a woman in her 70s who was at a Vaucluse cafe at the same time.
Dr Greg Kelly, from The Children's Hospital at Westmead in Sydney, blasted NSW Health over poor protocols that allowed the driver to contract the virus while working.
'This latest NSW leak 100% preventable. Australia, all that is standing between airborne #COVID-19 & frontline workers (and therefore you, grandma & the rest of us) is a flimsy surgical mask,' he wrote.
Health authorities are urging anyone who went to the National Gallery of Australia's Boticelli to Van Gogh exhibition or gift shop from 12-1.45pm last Monday to get tested and immediately isolate
Anyone who visited Via Dolce Pasticceria, a popular Italian dessert and pizza eatery last Monday from 2.45-3.15pm is advised to get tested and immediately isolate
The Indian Delta variant of the virus is believed to spread faster than the Indian Kappa strain, with global health experts warning it could also be even deadlier. Pictured are cars lining up for Covid-19 testing at Bondi on Thursday
Testing queue swelled again on Thursday as yet more exposure sites were announced (pictured, the drive-through clinic in Bondi Beach)
'No airborne PPE, no smart workplace engineering, & no vaccine. THIS JUST ISN'T GOOD ENOUGH.
'People absolutely need to start losing jobs over this, and I don’t mean poor cafe and gym owners, I mean people with responsibility for quarantine.'
A man in his 40s in Sydney's north-west, with no known links to other infections, has also tested positive - but authorities are still investigating whether he currently has the virus.
An infected case visited Northmead Bowling Club (pictured) on Sunday for six-and-a-half hours
Northmead Bowling Club was announced as an exposure site late on Thursday night, with anyone there from 3.30pm to 10pm on Sunday June 13 told to get tested and isolate immediately.
A further venue in the East Village Shopping Centre in Zetland has also been put on alert, with anyone who went to Lorna Jane in the centre on Monday between 11am and 1pm told to seek testing and isolate for two weeks, regardless of the result.
Bondi's The Health Emporium is also now on the list.
Gladys Berejiklian has warned Sydney residents to avoid large-scale events near the city's growing list of 19 exposure sites to prevent a potential super-spreader event.
An infected man is believed to have shipped at the Leichhardt Harris Farm on Tuesday between 9.50am and 10.05am
However she stopped short of making face masks compulsory on public transport.
Chief Health Officer Dr Kerry Chant said genomic sequencing showed the limousine driver had a strain of the highly-contagious Indian Delta varient never seen before in Australia.
'This strain does not match anything that's been uploaded in Australia at this time, but it does match perfectly a sequence that's been uploaded from the US,' she said.
The Indian Delta variant of the virus is believed to spread faster than the Indian Kappa strain, with global health experts warning it could also be even deadlier.
Ms Berejiklian said she strongly recommended wearing a mask on public transport in the eastern suburbs of Sydney.
The announcement came as Tasmania, Victoria and Queensland announced anyone who had been to the exposure sites was not allowed to enter their state.
Digital signs encouraging customers to wear face masks during the pandemic pictured at Westfield Bondi Junction. A woman in her 70s has also tested positive in Vaucluse, meaning Sydney's latest outbreak has reached four cases
The island state announced Wednesday morning it would block all New South Wales travellers who had been to any of the hotspots and anyone who had visited a listed site since June 11 has to immediately get tested and isolate.
'Anyone who is planning on travelling to Tasmania who has been to any of these high-risk premises at the specified dates and times will not be permitted to enter the state,' Tasmania's Director of Public Health Mark Veitch said.
Queensland Premier Annastacia Palaszczuk also said she would closely monitor the ongoing situation, with closed borders likely to occur given the previous decisions to quickly block residents from New South Wales from entering the state.
SYDNEY VENUES EXPOSED TO COVID-19
- Anyone who attended the following venue at the time listed must get tested and self-isolate for 14 days from the date they were at the venue, regardless of the result.
Bondi Junction, Events Cinema, Sunday, June 13 - 1.30pm-4.00pm
Bondi Junction to North Sydney 200 Bus, From Bondi Junction interchange to Blue St, North Sydney (near North Sydney Station) Tuesday 15 June. Departed approx. 4.25pm, arrived approx. 5pm
- Anyone who attended the following venues at the listed times must call NSW Health on 1800 943 553, get tested and self-isolate until you receive further advice.
Vaucluse, Belle Cafe, Friday, June 11 - 9.15am-9.50am,
Saturday, June 12 - 11.20pm-1.50pm,
Sunday, June 13 - 11.30am-12.00pm,
Tuesday, June 15 - 9.50am-10.25am
Bondi Junction, Sourdough Cafe, Friday, June 11 - 12.40pm-1.10pm
Vaucluse, Belle Cafe, Saturday, June 12 - 10.20am-10.45am
Bondi Junction, David Jones, Saturday, June 12 - 11.00am-11.40am
Bondi Junction, Myer, Saturday, June 12 - 11.10-12.15pm
Events Cinema Bondi Junction: (all screenings other than the Hitman's Wife's Bodyguard), Sunday June 13, 1.30pm-4pm.
Vaucluse, Washoku Vaucluse, Saturday, June 12 - 12.00pm-1.30pm
Vaucluse, Rocco's, Monday, June 14 - 10.55am-11.30am
North Ryde, Celeste Catering Macquarie Park Cemetery Cafe, Tuesday, June 15 - 1.00pm-1.20pm
Zetland, Coles East Village Shopping Centre, Monday, June 14 - 11.00am-1pm.
Zetland, Taste Growers East Village Shopping Centre, Monday, June 14 - 11.00am to 1pm.
Redfern, Wax Car Wash Cafe, Monday, June 14 - 12pm-3pm
Bondi Junction, Harry's Coffee and Kitchen, Tuesday, June 15 - 3pm-3.40pm
Bondi Junction, NAB in Westfield, Tuesday, June 15 - 2.45pm-3.10pm
Bondi Junction, David Jones in Westfield, Tuesday June 15 - 3.30pm-4.15pm
Vaucluse, Field to Fork, Friday, June 11 - 12pm-4pm
Leichhardt, Harris Farm, Tuesday June 15 - 9.50am-10.05am
- Anyone who attended the following venue is a casual contact and must immediately get tested and self-isolate until a negative result is received.
Bondi Fruitologist, Tuesday June 15 - 1pm-2pm