Premier Daniel Andrews confirmed 17 new cases of COVID-19 on Tuesday, bringing the state's tally to 1864. More than 100 cases remain active.

One of the new cases is a returned traveller in hotel quarantine, two are linked to a known outbreak while three are the subject of routine testing.

Eleven cases are under investigation.

"What we can be certain of is that there will be some significant community transmission within those numbers," Mr Andrews said.

"We simply can't pretend that the virus is gone, that the virus is somehow not in our state. It's here, it travels so fast, it is so infectious."

More than half of the state's new cases since the end of April have involved family members spreading it to their relatives, resulting in the local government areas of Hume, Brimbank and Moreland in Melbourne's west and Cardinia in the city's east being declared as coronavirus hotspots.

A team of 50 people will doorknock residents to provide additional information about the virus and in languages other than English, following concerns COVID-19 warnings haven't been reaching multicultural communities.

"We're really working hard to make sure that every Victorian, regardless of their circumstance, knows and understands the rules, knows and understands how serious this is," Mr Andrews said.

COVID-19 testing sites have also extended their operating hours at Chadstone, Highpoint, Northland, Pacific Epping and Pacific Werribee shopping centres following reports of long queues.

The premier said the state would deliver more drive-through testing sites if required.

"I'm very proud to think that Victorians are coming forward and getting tested even though they know it is going to take some time, I apologise for any delays," Mr Andrews said.

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"To a certain extent, it will be inevitable that there will be some waiting."

Despite the spike in the new cases, he defended the state government's handling of the virus.

"This is not a zero cases every day strategy," Mr Andrews said.

"That is not what we are aiming for at this point.

"There is an acceptable level of new cases. We're not at that point now. The amount of community transmission that we've got is too high."

The Australian Health Protection Principal Committee on Sunday urged residents in hotspots not to leave their suburbs until community transmission issues were resolved.

Meanwhile, Brunswick East Primary School and Keilor Views Primary School were closed after a student at each facility tested positive for the virus.

The schools will remain closed until at least Friday for cleaning, with contact tracing also underway to determine whether any staff or students should self- isolate.

The closure of Keilor Views Primary School comes after the adjacent Keilor Downs College was forced to shut again on Monday.

The college was closed after an infected student went to school for two days.

Today: 17 new cases

Monday: 16

Sunday: 19

Saturday: 25

Friday: 13

Thursday: 18

Wednesday: 21

-AAP