The Health Ministry recently warned of a resurgence in Covid-19 cases, saying it is very likely that the Omicron BA.5 variant has already spread throughout the country. How should health policymakers, and the public, be thinking about mitigating this next wave? Should a second booster shot be required? Melisa Idris speaks to Dr Vinod Balasubramaniam, Senior Lecturer and Lead of the Infection & Immunity Research Strength at the Jeffrey Cheah School of Medicine & Health Sciences of Monash University Malaysia.