Victoria has notched 20 days without a locally acquired coronavirus case.
The Department of Health and Human Services' daily updated revealed one COVID-19 case acquired overseas, which is being managed in the state's hotel quarantine system.
There are 31 active coronavirus cases in Victoria, following 11,656 tests in the past 24 hours to midnight.
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New Zealand bubble burst for 72 hours
On Sunday, NZ authorities revealed a 56-year-old woman had tested positive for the virus after completing her 14-day isolation after arrival in New Zealand, believed to have caught it from anther traveller in quarantine.
This prompted the Australian government to suspend its open border with New Zealand for 72 hours, starting Monday night, after concerns about the possible transmission of the South African strain of COVID-19 in the community.
People who have arrived in Australia from New Zealand since January 14 are asked to self isolate, and arrange to get tested and stay in isolation until they receive a negative result, Health Minister Greg Hunt said.
Pfizer BioNTech vaccine gains TGA approval
Earlier on Monday, the Australian government triumphantly announced the Pfizer BioNTech vaccine have been approved by the Therapeutic Goods Administration.
The regulator said on Monday that after an independent review, the vaccine had met high safety standards.
The vaccine has been approved for people 16 years and older, with two doses required at least three weeks apart.
The federal government said the first vaccines were expected to be administered in late February, a slight delay on earlier predictions of mid-February due to production issues.
If there are delays, the vaccine could be rolled out in March, but the government has stressed advice from Pfizer that a February rollout was likely.
Despite the delays in production, Prime Minister Scott Morrison said "no Australian vaccines - i.e. vaccines destined for Australia - have been diverted anywhere else".
Mr Hunt said he had spoken with representatives of Pfizer, who had assured him they would be able to ship the first doses of the vaccine, of which Australia has ordered 10 million, in time to start vaccinating in February.
"Those shipping times were provided last night, which means we are in a position to commence in late February and our guidance has always been for a window," Mr Hunt said.
Unlike in many other countries, Australia's regulator has not used emergency processes to approve the Pfizer vaccine for use, instead using a prioritised provisional determination process.
There were fears the approval process could be delayed after Norway reported a number of deaths in elderly and frail aged care residents after receiving the vaccine.
Despite this, the Therapeutic Goods Administration has not yet released specific advice on whether the vaccine is approved for the very elderly or terminally ill.
That decision will be left to doctors to decide if their patients should receive the vaccine.
"The TGA advice - and we have been concerned about this - for the very elderly and frail, that will need a very careful clinical decision," Health Secretary Brendan Murphy said.
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