More than 80% of the eligible Australian population is now fully vaccinated against COVID-19.
It’s a major milestone, and it comes as the federal government’s population-wide booster program gets underway.
So what does the science tell us about why boosters are necessary?
And will we all need more than one?
Today on The Signal, everything we know and don’t know about vaccines, boosters and waning immunity.
Professor Tony Blakely, School of Population and Global Health, University of Melbourne