Restrictions on gatherings of people, including the number of guests at a household and how many people could be outside exercising together have been in place for weeks, with some states like NSW and Victoria enforcing stricter versions than South Australia and Western Australia.

In the ACT, no more than two extra people can be in a house other than those who live there, and the government has asked that visits be restricted for necessary things like care-giving.

On Friday, Chief Medical Officer Brendan Murphy was asked whether restrictions on small gatherings could be lifted gradually to five people, or ten, before bigger outdoor gatherings would be allowed.

"The National Cabinet has asked us to come back with a range of potential recommendations for gently, carefully, cautiously relaxing distancing measures," Professor Murphy said.

"And, of course, the size of gatherings will be in that mix."

Professor Murphy said the Australian Health Protection Principal Committee would be giving advice to national cabinet along the lines of gradually increasing the size of gatherings.

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Australia has so far experienced success in flattening the curve of coronavirus cases, but Prime Minister Scott Morrison said the national restrictions wouldn't be considered for easing until May 11.

Authorities will be working to get data metrics to inform that decision-making.

However restrictions introduced in individual states above those levels could be eased earlier.

"We are seeing states and territories individually waiving various parts of the restrictions they have put in place above the baselines," Mr Morrison said.

"They're making those announcements almost on a daily basis. We welcome that, whether it's in schools or in other areas, and we can expect to see that happen over the next few weeks."