Anthony Fauci, MD, director of the National Institute of Allergy and Infectious Diseases, and one of the main spokespersons for science in the hydroxychloroquine debate, has continued to try to make his concerns clear: “I think we’ve got to be careful that we don’t make that majestic leap to assume this is a knockout drug,” he said in late March. “We still need to do the kinds of studies that definitively prove whether any intervention—not just this one, any intervention—is truly safe and effective.”