The medical trial that proved Trump wrong

Available for over a year

The Recovery Trial, a nation-wide clinical study in the UK, helped identify treatments for Covid 19 in the early months of the pandemic. Tim Harford speaks to Professor Martin Landray of Oxford University whose team established the randomised trial. (Covid-19 patient in an Intensive Care hospital ward, London June 4 2020. Photo: Lynsey Addario /Getty Images)