But Andrews spoke about "numbers heading in the right direction" in his Sunday press conference.
But, Professor Sutton added, the number of new daily cases would have to drop significantly before restrictions could be eased.
While Victorian Premier Daniel Andrews has evaded questions on plans for easing restrictions, the Premier has repeatedly said he wants "as many people at Christmas dinner as possible". We will have to wait and see what tomorrow's numbers are.
"I certainly can't rule out that there will be other outbreaks in other aged homes but we're all in there working as hard as we can".
"Ultimately those rules are only as good as the many millions of individual choices and decisions that individuals and families make every single day", he said.
During the curfew, people in Melbourne can only leave their house for work, and essential health, care or safety reasons.
That means "not breaking those rules, not going out, not being out after curfew, not ignoring symptoms and waiting two to three days and then may be getting a test or maybe not".
Then, Mr Andrews said Victoria could begin the process of not only opening up but rebuilding.
One woman in her 80s, two men in their 80s, and a woman in her 90s died from the disease, the premier said.
There were 16 deaths recorded, with 11 of those linked to aged care.
At least 662 Victorians are in hospital with the virus, 40 of whom are receiving intensive care and 29 are on a ventilator.
It is in addition to a separate state of disaster that was declared earlier this month in response to the deadly second wave of coronavirus.
On the latest figures, 1164 are dealing with the virus.
Sutton noted the number of active cases in aged care (2938) and among healthcare workers (1178) are stabilising but there were still "far too much". "700 cases or more, we are now not in that territory, that is what the data says to us", he said.
Andrews said health officials were launching a new testing blitz in three major regional towns - Ballarat, Geelong and Bendigo - amid "worrying trends" indicating the virus could be spreading among residents.
Victoria has recorded a drop in coronavirus cases.
But deputy chief health officer Allen Cheng said authorities were looking "very closely" at whether to increase restrictions to match Melbourne's tough Stage 4 lockdown.
"If there is one ask is a takeaway from today's briefing, if people in those regional cities ... can come forward and get tested, that is the really important part of us keeping the numbers in regional Victoria low".