Christiane Amanpour is joined by Nobel Prize-winning economist Paul Krugman to discuss how he thinks the global economy will fare as some countries begin to ease their lockdown measures. Walter Isaacson talks to Dr Robert Gallo, a world-renowned virologist who helped discover the HIV virus. He's now leading an initiative to repurpose the oral polio vaccine which he believes could provide some months of immunity. And Christiane speaks to Caroline Criado Perez, author of "Invisible Women" and Dr Sharon Moalem, author of "The Better Half" about why early statistics suggest that the coronavirus is killing more men than women.To learn more about how CNN protects listener privacy, visit cnn.com/privacy