Record-Breaking 4.6 Million Vaccine Doses Administered on Saturday | NBC Nightly News

More than one in four adults in America are fully vaccinated. In Michigan, the new Covid-19 epicenter, the U.K. variant is causing many hospitals to near capacity.» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews

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Record-Breaking 4.6 Million Vaccine Doses Administered on Saturday | NBC Nightly News