A virologist who supports gain-of-function research and believes COVID-19 evolved naturally is the new acting director of the National Institute of Allergy and Infectious Diseases (NIAID), the agency Dr. Anthony Fauci led for 38 years. Jeffery Taubenberger, M.D., Ph.D., a 19-year veteran of NIAID and chief of the institute’s Viral Pathogenesis and Evolution Section, replaced Dr. Jeanne Marrazzo, who was placed on leave last month by the Trump administration. Citing an email from Dr. Matthew Memoli, deputy director of the National Institutes of Health (NIH), Science reported that Taubenberger’s first day as acting director was April 25. Taubenberger will head...