EditorialMore than 100 people tested positive for the coronavirus after Biogen's pharmaceutical conference in Boston, perhaps seeding thousands more cases. (Cody O'Loughlin/The New York Times)
EditorialA Marriott where a Biogen conference in February was a superspreading event for the coronavirus in Boston, March 19, 2020. (Cody O'Loughlin/The New York Times)
EditorialA Marriott where a Biogen conference in February was a superspreading event for the coronavirus in Boston, March 19, 2020. (Cody O'Loughlin/The New York Times)