NSW is on high alert over cases in Shepparton as a major testing blitz happens in the regional city.
Victorian Premier Daniel Andrews said all six of today's new cases were in Melbourne, with the rolling average over 14 days being 8.9 for metro areas and 0.6 cases in regional.
"Yesterday, 1862 people got tested - that is an amazing effort. I know it's not a quick process," he said.
"We expect another 2000 tests to be conducted over the course of today."
Usually, 60 people get tested a day in the city.
Mr Andrews said after speaking to MP Suzanna Sheed, efforts were being made to support people while they waited and to identify people in the queue who were closer contacts than others.
Five of the eight active cases regionally are in Mitchell Shire, three are in Shepparton, which were reported in yesterday's figures.
DHHS commander of testing Jeroen Weimar said testing started at 7.15am and about 410 people were isolating in the city.
"Please bear with us and get tested today," he said.
Mr Weimar said 350 results had come back from yesterday's testing clinics, with all being negative.
"We will be doing updates throughout the day," he said.
"I'm also very grateful to the health teams from Bendigo Health, Ballarat Health and Albury Wodonga Health; we have extensively drawn teams from across the northern half of our state to support the testing in Shepparton."
The truck driver who brought COVID-19 to Shepparton stayed in Kilmore in a private residence on September 29 and then travelled to Shepparton and Benalla on September 30.
The driver was interviewed again yesterday and DHHS is confident they have all the relevant information about his travel.
Victoria's Deputy Chief Health Officer Allen Cheng admitted there could have been a chance this truck driver, as a contact of a close contact, could have been picked up if DHHS had brought in the practice earlier.
But he said the truck driver had already left for regional Victoria when the person he contracted the virus from - a contact of the Chadstone cluster - got their positive result back.
Professor Cheng was asked why Victoria began giving self-isolation orders to contacts of contacts later in the piece than NSW.
"Where there's a lot of opportunity to transmit, I think that justifies that, but we need to look at these situations as they occur," he said.
Mr Andrews said Victoria's numbers coming down meant DHHS could move to isolating contacts of contacts.
"Yes, NSW has being doing that for a while, because it's a function of small numbers," he said.
"When you get numbers well down, you can move to a system like that."
NSW on high alert over cases in bubble
NSW Health Minister Brad Hazzard says people with COVID-19 not telling the whole story to health authorities about their travel has been an issue for his state too.
"One of the ongoing problems that we've had in NSW but also in Victoria is that people are not necessarily telling us the whole truth and nothing but the truth," he said.
"Public health only has one interest and that is making sure you remain healthy but also the community retains its health.
"We've had a case overnight in Victoria where there is some indication a gentleman who was involved in driving trucks and involved in the tyre industry may not have actually expanded fulsomely on where he had been.
"As a result, we now have concerns in Shepparton which is within the NSW-Victorian bubble.
"That means we are now on very high alert in that area around our southern border.
"We've had to give special warnings to our health facilities."
Of the 11 new cases in NSW, six were locally acquired.
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Chief Health Officer Kerry Chant said NSW was being kept up to date about the Shepparton cases.
"We know that they're doing lots of testing and the Shepparton community has come out in force to get tested," she said.
"What we're concerned about is that these people that were infected could have infected others.