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Nathan Bartlett, Associate Professor, School of Biomedical Sciences and Pharmacy, University of Newcastle

Here's why you might need a 4th COVID vaccine dose this winter

Australia Omicron

When I began drafting this article, COVID cases in Australia were coming down and the situation was stabilising.

New research released in February showed a fourth COVID vaccine dose didn’t add much extra protection on top of a third dose. It looked as if doling out fourth doses to all Australians was unnecessary.

Unfortunately, the situation has changed again, and so has the risk calculation.

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