Australia won’t reach 80% Covid booster rate until well into 2022, analysis shows

by Josh Nicholas

18 December 2021

However, Australia’s slow initial vaccine rollout meant that more than half of all second doses were administered in the final four months of 2021. So with a five-month dosing interval, the people who received their second doses late in 2021 won’t be eligible for a booster until February.

Experts warn that a shorter interval between second and booster doses could mean the immune response is not as high or long lasting.

“We do know from evidence from the first two doses that a longer interval between the first dose and second dose gives you higher antibodies, higher protection,” says Cyra Patel, a PhD candidate at the Australian National University.

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