A Melbourne teenager has tested positive for COVID-19 after returning home from Sydney's northern beaches.
The 15-year-old girl visited several exposure sites, including the Avalon RSL and bowling club, before driving home from NSW with her mother.
They stopped at Gundagai's Oliver's Real Food on Thursday before arriving in Melbourne either late that night or early Friday.
The girl returned a positive test on Sunday, but it was only publicised on Tuesday.
Her mother has so far tested negative and the family of four are isolating at their home in the Moonee Valley local government area.
Health Minister Martin Foley said there were no known exposure sites this side of the border and close contacts of the family were being contacted.
Testing commander Jeroen Weimar stressed the family had done the right thing.
"This family has done what literally tens of thousands of people do. They go on holiday, meet family in another state, they do the things that we do, and they come home," he said.
As of Monday night, 17 people including a family of five were in hotel quarantine in Victoria.
They flew in over the weekend, some without the right permit and others from the northern beaches.
Victoria has shut its border to people travelling from greater Sydney and the NSW Central Coast.
"My message to anyone trying to enter Victoria from New South Wales is - don't," Mr Foley said.
"You won't get in, and if you do, you'll be spending your time at Christmas and New Year in hotel quarantine."
Local government area bubbles have been established on either side of the Victorian-NSW boundary to allow those in border communities to cross upon presentation of their driver's licence.
Meanwhile, Victoria on Tuesday reported its 53rd day without a locally acquired coronavirus case.
There are now 11 active cases in Victoria, including two returned overseas travellers and the NSW case.
Some 15,521 coronavirus tests were conducted in the past 24 hour-period.
The NSW government recorded eight new locally acquired cases on Tuesday.
Seven were linked to the outbreak on the city's northern beaches, taking the total to 90 cases.
The eighth case relates to a health worker in Sydney's west involved in the transfer of patients from the city's international airport.
"We are obviously doing urgent genome sequencing to confirm that that is the source of their infection," NSW chief health officer Dr Kerry Chant told reporters.
There were a record 44,466 tests reported in NSW to 8pm on Monday, compared with 38,578 in the previous 24 hours.
