Authorities have repeatedlysaid it takes two weeks usually to see the effect of restrictions on case numbers.
Meanwhile, Scott Morrison has slammed a Black Lives Matter protest planned in Sydney next week as "appalling" as cases of unknown origin continue grow in NSW.
Speaking on 2GB, the Prime Minister warned there was "no special rule" for people not to obey the law.
"I just think that's appalling," Morrison said. "What gives people a ticket to not obey the law?
"Where the State Government has said that there is a mass gathering that can't go ahead, well people should obey the law."
• Nineteen fines were issued at vehicle checkpoints at exit points to the city.
Victoria police said they checked 20,246 vehicles at vehicle checkpoints on the main arterial roads in and out of Melbourne in the past 24-hours, and conducted 4984 spot checks on people in their homes, businesses, or in public places.
Missing from quarantine
Almost 200 people who were supposed to be quarantining at home in Queensland have managed to evade police after lying about their contact details at the border.