Victoria has recorded 30 new COVID-19 cases with two children infectious as the state notches up a 10th day in a row of double-digit growth.
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Of the 1947 total cases, 183 are active including six in hospital.
Seven of the new cases are linked to known outbreaks, five are in hotel quarantine, five came from routine testing and 13 are being investigated.
A child at Smartie Pants Early Learning Centre in Diamond Creek and another from the Goodstart Early Learning in Box Hill have the virus.
Both children attended their respective centres while infectious and the sites are being cleaned.
A worker at the Orygen Youth Health facility in Footscray contracted the virus, the health department confirmed on Friday.
The centre is now in lockdown with a number of close contact staff and patients put into quarantine.
Of the new cases three are linked to a social gathering in Wollert, two of them being close contacts of existing cases.
The third is a student at St Monica's College in Epping who works at the Mill Park McDonald's. The store is shut after a deep clean and while contact tracing is conducted.
There are two active cases linked to the Coles distribution centre in Laverton, with one of those cases bringing the Keilor Downs family cluster to 19.
There's been an increase of 20,000 tests done since Thursday, bringing the total tests in Victoria to date above 736,000.
About 30 per cent of returned international travellers have refused to get tested, despite being offered multiple times during their stay.
"I believe that not everybody who has been offered testing has taken it up," Dr van Diemen said, noting it was not compulsory to get tested.
"We're getting about 70 per cent of people uptake tests."
Meanwhile, dozens of Centrelink contract staff who live in Victoria's coronavirus hot spots have been stood down amid concerns over the risk of community transmission.
The general manager of Centrelink's parent agency Services Australia, Hank Jongen, said fewer than 100 staff who live in the COVID-19 hot spots work outside those areas.
"These staff have been advised to stay at home while we review and adapt to the latest health advice and prevent unnecessary movement in and out of those areas," Mr Jongen said in a statement on Friday.
The labour hire staff are paid directly by labour hire providers and were paid for their rostered shifts on Wednesday, he said.
Chandler Macleod executive general manager Nick Gabrielidis told AAP a client decided to stand down staff living in hot spots, on the advice of the Australian Health Protection Principal Committee.
The Victorian local government areas of Hume, Casey, Brimbank, Moreland, Cardinia and Darebin have been flagged as virus hotspots.
About 4,800 thermometers are on their way to holiday locations as part of the state government's efforts to slow the virus spread as school holidays approach.
Australian Defence Force troops were called in to help the state with its COVID-19 testing blitz, but it is unclear how many will arrive.
Australian Associated Press