EditorialHealth care workers draw blood in a random sampling for coronavirus antibodies in Munich, April 15, 2020. (Laetitia Vancon/The New York Times)
EditorialPresident Donald Trump speaks during a coronavirus briefing in the Rose Garden at the White House in Washington, Tuesday, April 14, 2020. (Doug Mills/The New York Times)
EditorialResearch at a laboratory in Cambridge, Britain, April 8, 2020, to understand how immune system activation in COVID-19 disease might be related to antibodies binding to the virus. (Andrew Testa/The New York Times)
EditorialA baker set out bread at the end of the day for those in need, during the coronavirus pandemic in Milan, Tuesday, April 7, 2020. (Alessandro Grassani/The New York Times)