FILE - In this Jan. 18, 2021, file photo, Connecticut National Guard members wait to check-in vehicles for Connecticut's largest COVID-19 Vaccination Drive-Through Clinic in East Hartford, Conn. The push to inoculate Americans against the coronavirus is hitting a roadblock: A number of states are reporting they are running out of vaccine, and tens of thousands of people who managed to get appointments for a first dose are seeing them canceled. (AP Photo/Jessica Hill)
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