The head of the U.S. campaign to rapidly deploy a vaccine said on Sunday that U.S. healthcare workers and other high-risk people could start getting shots within a day or two of regulatory consent next month. U.S. approval for distributing a vaccine produced by Pfizer Inc and German partner BioNTech could come as soon as Dec. 11, Dr. Moncef Slaoui, chief scientific adviser for "Operation Warp Speed," told television news shows. "So I would expect, maybe on day two after approval on the 11th or 12th of December, hopefully the first people will be immunized across the United States," he said on CNN's "State of the Union."