There are now zero active cases in Warrnambool.

The partner of the positive Warrnambool-based Colac abattoir worker, a teacher at Warrnambool SDS, said they were in the dark.

"He hasn't heard anything today from DHHS, going on their advice he is cleared but we will wait a couple more days," she said.

"We're still none the wiser with what we're allowed to do, we have not heard from the DHHS at all, we've heard from his work, but whether they've wiped the positive record off we don't know.

"If you're saying there are now no cases in Warrnambool then they have swept it under the carpet, we haven't been told anything."

One more case has been linked to Australian Lamb Colac, with 83 recorded on Friday.

Active cases in Colac have dropped from 61 to 59 in 24 hours.

There are 167 cases in Greater Geelong, 56 in Bendigo, 25 in Ballarat, 12 in Moorabool, three cases in Horsham amd one in Moyne.

DHHS figures have recorded seven cases in Glenelg, but Portland District Health chief executive Chris Giles said there's eight active cases in Portland.

Update, 2.30pm: Portland District Health has revealed there's three new cases of coronavirus in the region, bringing the total number of active cases to eight.

Chief executive Chris Giles said this will be reflected in today's DHHS numbers and there's currently no risk of community transmission.

"Cases linked to the second cluster in Portland, these are cases that were highly likely to develop because close contacts of that cluster," she said.

"We expected numbers to go up as close contact results come in.

"They've all been in isolation because they are considered close contacts.

"There's no mystery cases, now we have eight active cases, up three in the last 24 hours."

Earlier, 1pm: South West Healthcare said all patients booked for surgery, other than emergency surgery, will be required to have tested negative to coronavirus beforehand.

Chief executive Craig Fraser said following their testing they'll be required to self-isolate until their surgery takes place.

"This self-isolation will, generally, be for no longer than five days," he said.

"Our elective surgery clinic will contact all future surgery patients to explain this process, which involves Dorevitch Pathology, located in our Warrnambool Base Hospital, running a surgery-specific asymptomatic screening clinic from 1.30pm to 3.30pm weekdays.

"No appointment is required but patients must bring with them a referral from their surgeon."

He said in future months the hospital will increase access to theatres but timelines will be fully dependent on state and regional COVID-19 numbers.

"In line with the rest of the state, non-urgent elective surgery other than category one and urgent category two has been reduced to ensure limited resources are available to respond to potential increasing COVID-positive demand," Mr Fraser said.

"This includes preserving our limited amount of PPE and frees up some nursing, cleaning, medical and other staff to focus on providing COVID-specific resources to both SWH and across our region.

"This proactive preparation for possible COVID presentations and hospitalisations also frees up some hospital beds. By reducing elective surgeries, beds become available because they're not needed for a post-surgery patient's recovery phase."

This week SWH's Rapid Assessment Community Evaluation (RACE) team has been entering the homes of the region's COVID-positive patients to provide the care and support their recoveries.

Mr Fraser said the work sees them travelling to oversee patients throughout 12,500 square-kilometres of rural communities, with focus on Portland and Colac.

Over the past week from August 7 SWH has screened another 319 people for coronavirus, taking total screenings to 8270.

Over the last week 95 people were tested at Warrnambool's Great South Coast Respiratory Clinic.

Earlier, 12.15pm: Daniel Andrews said he "won't rule out" stage four restrictions for regional hotspots like Geelong, Ballarat and Bendigo as the state recorded 372 new cases and 14 deaths on Friday.

One of the deaths was a male in his 20s, and 12 are linked to aged care.

During a meeting with regional media on Friday morning, the premier said numbers in the three hotspots were concerning, but "quite low".

"We wouldn't rule out doing more testing in more regional areas if we need, and we certainly can't rule out further restrictions," he said.

"The numbers are low and we want to keep them that way, but that's not a matter for today, it's a matter for monitoring numbers and the outcomes of that testing push.

"We don't want it to get into aged care in the regions like it has in Melbourne, we don't want to see large numbers of people gravely ill and in hospital.

"We know and understand how much pain and loss is associated with those changes."

There are 492 active cases in regional Victoria, down from 512 yesterday.

Friday saw 51 more mystery cases with an unknown source.

There are 1188 healthcare workers that are active cases, and 7482 active cases across the state.

Mr Andrews also said he wouldn't rule out hardening the border between regional Victoria and metropolitan Melbourne.

"I wouldn't rule out further steps to curtail movement between regional and metropolitan Melbourne, that movement needs to be at a minimum," he said.

Chief Health Officer Brett Sutton said 20 per cent of cases, or one in five, were mystery cases.

He also said unknown source cases are highest among those in the 20-29 age bracket.

"We can't determine absolutely where they've got it from," he said.

"I'm confident we've seen the peak of cases."

The Standard put questions to the Premier about the Warrnambool man who tested twice to COVID-19 and told that he could go back to work in 48 hours if he didn't have symptoms.

Mr Andrews said his office would get back with a response.

"What the chief health officer tells me is there can be dead virus that can still trigger positive test but your infectivity is very very low," he said.

"This virus travels silently and quickly, so even if you live in a community with low or no cases, that's of what we know of.

"We must act like there are more cases out there that we don't know about."

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