Dr. Anthony Fauci is the director of the National Institute of Allergy and Infectious Diseases and chief medical advisor to President Joe Biden. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal. A.S. Fauci. It Ain’t Over Till It’s Over … but It’s Never Over — Emerging and Reemerging Infectious Diseases. N Engl J Med 2022;