Ranj Singh looks at the urgent race to find drugs to successfully treat Covid-19. With hopes of defeating the deadly virus lying with the world's scientists - including those working in Britain - Dr Singh gains first-hand access to laboratories and drug trials across the country. He reports on the unprecedented scientific efforts going into developing drugs to treat those in hospital with the virus, as well as the search for a vaccine to inoculate everyone. With the success of these trials determining how soon people can resume normal life and get the economy running as before, the stakes could not be higher.