Dr. Moncef Slaoui, the chief scientific adviser for Operation Warp Speed, says it is possible the United States could reach herd immunity by May 2021.
CNN.com - RSS Channel, CNN: Video
Mon, 11/30/2020 - 7:16pm
Dr. Moncef Slaoui, the chief scientific adviser for Operation Warp Speed, says it is possible the United States could reach herd immunity by May 2021.