What's the difference in protection against Omicron between 2 doses and 3 doses of vaccine?

By Nathan Bartlett
Updated February 13 2022 - 8:04am, first published February 12 2022 - 6:00pm

The Australian Technical Advisory Group on Immunisation (ATAGI) changed the definition of "fully vaccinated" to three doses instead of two from the end of March.

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