The recent increase in case numbers and tightening of social distancing policies has again reminded Hong Kong residents that although the rest of the world has moved on to other things, our city continues to march to the dynamic zero Covid beat. In our latest podcast, Doctor David Owens and Professor Ben Cowling discuss a wide range of issues around the science of Covid including the emerging 6th wave, the evidence for vaccines and masks and lessons from the Russian flu pandemic of 1889. They also discuss Long Covid and answer questions from you our listeners.