The Food and Drug Administration on Friday authorized the coronavirus vaccine made by Moderna for emergency use, allowing the shipment of millions more doses across the nation and intensifying the debate over who will be next in line to get inoculated.The move will make Moderna’s vaccine the second to reach the American public, after the one by Pfizer and BioNTech, which was authorized just one week ago.The F.D.A.’s decision sets the stage for a weekend spectacle of trucks rolling out as expert committees begin a new round of discussions weighing whether the next wave …
