Pfizer, Moderna COVID-19 vaccines could reach all Americans by June—if politics don't get in the way: Slaoui

Moncef Slaoui, co-leader of the U.S. government’s Operation Warp Speed effort, is so confident that Moderna’s and Pfizer’s mRNA vaccines to prevent COVID-19 will succeed in phase 3 trials that he thinks every American could be immunized by June.