Western Australia's premier has defended the state's slow coronavirus vaccine take-up as he maintains his tough stance on borders and lockdowns.
The state is expanding its rollout from Monday with people aged 16 to 29 invited to make bookings to receive the Pfizer vaccine.
More than two million West Australians are now eligible, with Pfizer reserved for under 60s and others to continue receiving the AstraZeneca jab.
WA's vaccine rollout has been the slowest of any state or territory. Just 22.5 per cent of people aged 16 and over have received both jabs.
It comes as Premier Mark McGowan faces backlash for suggesting WA will continue to pursue a strategy of zero community transmission.
He says border closures and targeted lockdowns will remain options even when 80 per cent of the population has been vaccinated.
"We will do what's required to keep the people of our state safe," he told reporters on Monday.
"Over the course of the past 18 months, that's what we've done and we've had great successes as a consequence."
Mr McGowan said the national roadmap included scope for "highly-targeted lockdowns" at phase C, when 80 per cent of people are vaccinated.
National leaders agreed that states should retain the right to implement domestic border closures and that position had been accepted by the High Court, he said.
The premier bristled when asked what incentive people would have for getting vaccinated if the threat of lockdowns and border closures continued.
"We are following the national roadmap. It's there in black and white," he replied.
"If we have 80 per cent vaccination we still have 20 per cent of eligible people unvaccinated. That's 400,000 people ... some of them may well be very vulnerable.
"My view is, people in this state want the right to stay safe.
"In terms of vaccination I'd encourage, as we do every day, people to go and get vaccinated."
Mr McGowan said while NSW and Victoria had both endured months of lockdowns, West Australians had been confined for a total of 12 days during the pandemic and were now enjoying total freedoms within the borders.
The modelling behind the national roadmap indicated states would need to reintroduce restrictions on gatherings before easing border closures.
"We'd need to have lower crowds at stadiums, we'd need to have social distancing measures ... I'm pretty keen to avoid that," he said.
"And one of the ways we avoid that is doing everything we can to keep the virus out."
Prime Minister Scott Morrison earlier said the promise of removing restrictions was a key incentive for people to get vaccinated.
"Australians are working hard, making sacrifices, getting vaccinated, being subjected to lockdowns," he told Sky News.
"Now, they're all doing this for a reason - to get on the path out, and the path out is set out in that national plan."
