Why have some countries run mass-testing operations when others, including the UK, have not?

David Aaronovitch examines how South Korea and Germany have approached the coronavirus pandemic and what they have learned from the data they've gathered.

He also looks at how the hunt for a vaccine is progressing and who is in the race, as well as the role existing anti-viral drugs might play in reducing the threat posed by Covid-19.

Contributors:

Professor Devi Sridhar, Chair of Global Public Health, University of Edinburgh

Dr Jerome Kim, Director General of the International Vaccine Institute

Dr Philipp Zanger, Head of the Institute of Hygiene, Infection Control and Prevention at the Rhineland-Palatinate Agency for Consumer and Public

Professor Adrian Hill, Director of the Jenner Institute

Professor Johan Neyts, virologist, University of Leuven, Belgium.

Producers: Kirsteen Knight, Darin Graham & Rosamund Jones