Former Australian Ambassador to China Geoff Raby joins Amy for an in-depth conversation about his new book, China's Grand Strategy and Australia’s Future in the New Global Order, which examines China’s place in the world and the strategy behind its actions. They also discuss diplomatic relations between Beijing and Canberra, which are at an all time low. Why has the situation worsened in recent years and months, and what can be done? Epidemiologist and WHO COVID-19 advisor Professor Mary-Louise McLaws returns to discuss what we have learned globally about the coronavirus (SARS-Cov-2) and what we must do in Australia to keep COVID-19 transmission at zero to very low. Mary-Louise also discusses the risk of viral transmission through aerosol particles, how best to ventilate spaces, contact-tracing best practice, and the concerning development of people chronically ill with 'long COVID'. Plus Ben Eltham calls in to talk about the latest in federal politics.