Dr Mary-Louise McLaws from the University of New South Wales estimates that at least 90% to 95% of Australians would need to receive a COVID-19 vaccine in order to combat new strains of the coronavirus.
She adds that achieving herd immunity would require up to 190,000 Australians to be vaccinated every day.
Meanwhile, infectious diseases expert Dr Sanjaya Senanayake has warned that at the current rollout rate, it will take six years to fully vaccinate the world’s population against COVID-19.