Anger is growing in Australia as 13 million people - about half the population - endure fresh lockdowns to quash Covid outbreaks.
A third state went into lockdown on Tuesday. Stay-at-home orders are now in place in South Australia, Victoria and parts of New South Wales.
Many people have expressed frustration at being back in highly policed lockdowns 18 months into the pandemic.
And re-openings in the UK and the US have put pressure on the government.
Fewer than 14% of people are vaccinated - the worst rating among OECD nations.
Prime Minister Scott Morrison has been heavily criticised over the slow vaccination rate, but has resisted calls to apologise.
"No country has got their pandemic response 100%," he told reporters on Wednesday.
He again mentioned Australia's success in keeping overall infections low compared to those in many nations.
915 people have died of Covid in Australia. Mr Morrison noted that the UK had recorded more than 90 deaths in a single day on Tuesday.
Until recently, Australia's strategy of border closures, quarantine programmes and snap lockdowns helped keep cases low. But the highly contagious Delta variant has challenged these defences in the past month.