Harvey Risch, professor of epidemiology at Yale School of Public Health, says that hydroxychloroquine is “the key to defeating COVID-19” in a Newsweek op-ed published this past week. “I am usually accustomed to advocating for positions within the mainstream of medicine, so have been flummoxed to find that, in the midst of a crisis, I am fighting for a treatment that the data fully support but which, for reasons having nothing to do with a correct understanding of the science, has been pushed to the sidelines,” Risch wrote. “As a result, tens of thousands of patients with COVID-19 are dying...