Victoria has gone three weeks without a new COVID-19 case or death, as the state closes its border with South Australia and embarks on a testing blitz in two regional towns.
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There are two active coronavirus cases remaining across Victoria, according to figures released by the health department on Friday.
However investigations continue into a weak positive test result that may be a case of virus shedding.
Some 18,474 Victorians were tested for the virus on Thursday.
The last time Victoria recorded a three-week streak of no new cases was in February.
The virus-free results continue for Victoria as a "hard border" with virus-hit SA came into affect overnight.
It will remain in place until Sunday when a permit system is implemented.
The 48-hour shutdown was prompted by the unexpected detection of virus fragments in wastewater at the regional Victorian centres of Benalla and Portland. Both locations are along freight corridors, and the results emerged amid Adelaide's growing cluster which has sparked a six-day "circuit-breaker" lockdown over the border.
Residents of Benalla and Portland, as well as anyone who visited them between Sunday and Tuesday with any symptoms, are urged to get tested and isolate until receiving their result.
New testing sites will be opened on Friday as part of the testing push.
Victoria's Deputy Chief Health Officer Allan Cheng said the virus fragments could either be from an active infection, or a recovered case who may still be shedding the virus.
Under the hard border, only freight drivers and those with medical or emergency reasons, as well as people authorised by law, such as child protection officers, will be able to cross the border.
More than 300 police will patrol the Victorian side of the SA border, from Mildura to Portland.
It's the first time Victoria has shut its border to any state during the pandemic.
The border closure will not impact plans to further ease Victorian restrictions on Monday.
The state's virus death toll stands at 819, with the national figure 907.
Australian Associated Press