The AstraZeneca COVID vaccine is "making a comeback" as Australia maps its way out of rolling lockdowns, according to Scott Morrison.
The prime minister and and state and territory leaders gave in-principle backing on Friday to a four-phase pathway for the country to ease restrictions.
It's based on first achieving a vaccination rate of 70 per cent, with the AZ jab necessary to reach those levels, Mr Morrison told 2GB radio in Sydney on Saturday.
About 18 per cent of Australians have been fully vaccinated.
Mr Morrison said AstraZeneca has been "talked down for a long time" but the jabs are especially vital in greater Sydney, as the city deals with a worsening outbreak and prolonged lockdown.
NSW reported 210 new locally acquired virus cases on Saturday. At least 32 of them were circulating in the community for all or part of their infectious period.
The ADF is deploying another 300 personnel to help NSW Police with isolation and welfare checks, in addition to 250 members already working in quarantine compliance.
Meanwhile Queensland has imposed a snap three-day lockdown with six new cases reported on Saturday, while Sydney and surrounding regions remain in lockdown until at least the end of next month.
The AZ jab has not been the preferred option for people under 50 due to a very rare blood clot side effect.
And the vaccine rollout is still beset by other problems, with doctors worried they could be sued for administering COVID vaccines.
Delegates at the Australian Medical Association national conference on Saturday renewed calls for a no-fault vaccination indemnity scheme, as promised by the federal government in June, but still not finalised.
Dr Chris Moy told the conference the "frustrating" issue had compromised the rollout at critical stages.
Mr Morrison has promised enough vaccines for the country to reach the 70 per cent full coverage by Christmas.
According to the plan agreed to on Friday, when the rate of fully vaccinated Australians reaches 70 per cent, lockdowns will be possible but unlikely, with low-level restrictions favoured to minimise serious illness, hospitalisation and deaths.
When vaccination rates reach 80 per cent, city-wide lockdowns are expected to end with restrictions to be targeted to protect outbreaks among vulnerable populations.
Fully vaccinated residents will be exempt from all domestic restrictions, while caps on returning Australians will be abolished.
People who have received both jabs will be allowed to travel overseas and travellers from countries with high vaccination rates will be given the green light to enter.
But Mr Morrison's plan for a vaccine passport looks set to be challenged in court.
Mining magnate and former federal politician Clive Palmer has announced he will launch a High Court challenge to the proposal, arguing it is unconstitutional.