Four Queenslanders had allergic reactions to the vaccine in the past 48 hours, leading to the state urging anyone with a history of anaphylaxis to avoid getting the jab.

It comes just a day after the nation's medical experts moved to reassure concerns over the jab after several European countries halted rollouts following reports people developed blood cots after receiving the jab, but there is no evidence so far the vaccine caused the issue.

More than 50 million doses of the AstraZeneca vaccine have been ordered by the federal government.

Australia will ask AstraZeneca and the European Union to fast-track the export of one million doses of the vaccine to Papua New Guinea as the country battles a growing COVID-19 outbreak.

The federal government has also placed limitations on travel to and from Australia's closest neighbour.

Phase 1B of Australia's vaccine rollout is due to start next week, with six million people eligible to be vaccinated under the stage.

But the government's booking website was hit with technical difficulties on Wednesday morning, just hours after going live.

Phase 1B includes vulnerable groups, such Aboriginal and Torres Strait Islander adults over 55, adults aged 70 and over, and adults with certain underlying medical conditions.

More than 1000 general practices across Australia will join the COVID-19 vaccination program from next week, but Tasmanian GPs are yet to receive their supply of the vaccines.

Dr Donald Rose of Summerdale Medical Centre in Tasmania said GPs had been left in the dark over the next phase.

"We don't know what's happening," he said.

"GPs are as poorly informed as everyone else."

Prince Charles has also weighed in on the vaccine debate, criticising those lobbying against coronavirus jabs.

"Who would have thought ... that in the 21st century that there would be a significant lobby opposing vaccination, given its track record in eradicating so many terrible diseases and its current potential to protect and liberate some of the most vulnerable in our society from coronavirus?" he wrote for the Future Healthcare Journal.

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