Victoria has recorded 21 new cases of coronavirus, the biggest daily increase in more than a month.
Health Minister Jenny Mikakos on Wednesday announced the state's infection tally had increased to 1762.
Of the 21 new cases, 15 are returned travellers in mandatory hotel quarantine.
Ms Mikakos said two of the remaining six new cases have been linked to known outbreaks while the others were detected through routine testing.
A staff worker from Stamford Plaza Hotel, which houses returned travellers, became infected with COVID-19.
Another positive test from a resident at aged care centre Rosstown Community in Carnegie has put the centre into lockdown.
The 53-bed facility run by Glen Eira council will have to undergo deep cleaning and contact tracing
Meanwhile, a childcare worker has tested positive for coronavirus, prompting the closure of the Melbourne centre.
A health department spokesperson on Wednesday confirmed a staff member from Inspira Early Learning Centre in Gladstone Park had been diagnosed with COVID-19.
The worker attended the centre while infectious for two days last week and families have been notified, while the centre has been closed for cleaning and contact tracing for at least a day.
The new confirmed case follows the closure of a third Victorian school this week, after a child tested positive to coronavirus.
The student at Strathmore Primary School was one of nine new COVID-19 cases recorded in Victoria on Tuesday.
The primary school was expected to remain closed for 24 hours on Tuesday while it was deep cleaned and close contacts were traced.
Pakenham Springs Primary School and St Dominic's Primary School in Broadmeadows were closed on Monday after two students at each school tested positive.
The four students are part of an extended family cluster that increased by one more case on Tuesday.
A total of 12 people in the family have now contracted coronavirus after attending gatherings across homes in Broadmeadows, Coburg and Pakenham.
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