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

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

Omicron Australia Pfizer ATAGI Greg Hunt

Australian Health Minister Greg Hunt said last week he expects the Australian Technical Advisory Group on Immunisation (ATAGI) to change the definition of “fully vaccinated” to three doses instead of two.

It comes as evidence emerges suggesting the highly infectious Omicron variant has the ability to escape the protection two vaccine doses offer.

So, how effective are two doses compared to three against Omicron?

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