Epidemiologist Professor Mary-Louise McLaws explains how Australia can reach herd immunity against COVID-19 and when children should be vaccinated against the virus in Australia. She also discusses the Delta variant outbreak in NSW and its concerning trajectory, the reality of Long COVID, and whether we will ever be able to treat this virus “like the flu,” as the Prime Minister suggests. Mary-Louise is a member of the WHO’s Advisory Panel for Infection, Prevention and Control Preparedness and Response to COVID-19.