THE HOUSEHOLD contacts of Victoria's mystery COVID-19 case have all returned negative test results, health authorities say.
The mystery case - a worker at a Moonee Valley drive-through testing site - was announced on Wednesday.
Authorities on Thursday confirmed the worker's household contacts, and several social contacts, have returned negative coronavirus tests.
The worker visited his partner at a Newport apartment block in Melbourne's south-west. Residents at that site were being tested on Thursday.
The health department confirmed contact tracers would continue to interview the mystery case to determine how he contracted coronavirus.
Acting chief health officer Ben Cowie said he believed the man was not vaccinated.
Professor Cowie said while positive coronavirus cases were tested at the Moonee Valley site on the days he worked, the man had very minimal contact with people.
Health Minister Martin Foley confirmed the remaining six new locally-acquired cases announced on Thursday were connected to known outbreaks.
Four of the cases were students from Bacchus Marsh Grammar, while the remaining two cases were connected to a Docklands apartment site.
Mr Foley said there were seven Victorians in hospital with COVID-19. There were two people in intensive care, with one of those people on a ventilator.
Victoria has recorded seven new coronavirus cases in the last 24 hours.
Six of the cases are linked to current outbreaks and have been in quarantine but one mystery case is under investigation.
The worker, who is a traffic controller, worked for two days while infectious.
Health minster Martin Foley said the case wasn't a confirmed close contact and developed symptoms on Monday night, The person was tested on Tuesday and positive results came through Wednesday morning.
The mystery case come as Bendigo continues to reopen after lockdown.
However, mental health experts are warning that more people are leaving the latest lockdown worn down by the seesawing nature of restrictions.
They are noticing increasing levels of "covid fatigue" among business people and the wider population.
"Most of us base our lives on routine and like to plan out how things will go. The yo-yoing has affected our abilities to plan," Bendigo headspace team leader Lindsay Rose said.
"We've seen a large increase in people identifying they're tired, they want things to return to the way they were and coupled with the knowledge things won't go back to normal soon has left them feeling disheartened."
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