News update: Since publishing this podcast China announced on October 9 that it has joined Covax, the global scheme for the distribution of COVID-19 vaccine backed by the World Health Organisation. There are currently more than 150 Covid-19 vaccines in development. Billions of dollars are being pumped into research in the hope that a viable drug can reach the market in record time and ease the effects of the pandemic on individuals, societies and the global economy.  This week we talk about the challenges in the race to find a coronavirus vaccine. We hear from Dr Jeremy Rossman, a virologist at the University of Kent, and Daniel Bardsley, who writes about the coronavirus for The National. Hosted by Suhail Akram.