A 20-year-old Australian man has died of Covid-19 in Sydney as the state continues to record hundreds of Delta cases daily. New South Wales is in lockdown until the end of the month as it tries to rein in the numbers. Queensland is also battling a delta cluster with up to 17 new community cases today. It is locked down until at least the end of week. Bill Bowtell is a professor at the University of New South Wales and a strategic health policy adviser. He discusses the details with Lisa Owen.