Where are we on treating Covid-19?
US President Donald Trump is back in hospital being treated for Covid-19 after a brief trip out in his motorcade to wave at supporters. The outing came after a weekend of mixed messages as to the state of the president's health, amid reports that he is taking a number of steroids and antivirals to treat the infection. We speak to Keith Neal, a professor of the epidemiology of infectious diseases at the University of Nottingham. He gives us his Perspective on how dangerous Trump's trip outside the hospital was and brings us the latest on treatments for the virus.