C.D.C. Calls for Face Masks at Large Gatherings, Warning of Crowd Risks
Three months after the country’s top public health agency, the Centers for Disease Control and Prevention, abruptly stopped holding regular briefings on the coronavirus pandemic, its director, Dr. Robert Redfield, restarted them on Friday amid growing calls for the agency to claim a more prominent role in the virus response. The C.D.C. also released a…