Opinions | I’m an epidemiologist. Here’s what I got wrong about covid. Eleanor Murray © John Locher/AP Registered nurse Rocio Ortiz administers a shot at a vaccination event for workers at an Amazon Fulfillment Center on March 31 in North Las Vegas. (AP Photo/John Locher) Like many epidemiologists, I have for the last 15 months been intensely focused on covid-19. One of the most surprising aspects of this work has been the constant, often aggressive, criticism directed at my field — from insinuations that epidemiologists aren’t smart enough to grasp key issues (co...