The F.D.A. plans to announce as early as Wednesday an emergency use authorization for remdesivir, an experimental antiviral drug that is being tested in treating patients with Covid-19, the disease caused by the coronavirus, according to a senior administration official.
Before the announcement President Trump and Dr. Anthony S. Fauci, the federal government’s leading infectious diseases scientist, on Wednesday hailed early trial results of the drug, holding out hope that it could help stem the rising death toll.