One two-dose vaccine, developed by the U.S. drugmaker Pfizer and the German firm BioNTech, was the first authorized by the Food and Drug Administration for emergency use. The first shipments were made on Dec. 14, 2020. A second vaccine, which was developed by Moderna and also requires two doses, began shipping vials on Dec. 20, 2020.

On Feb. 27 2021, the FDA granted emergency use authorization for Johnson & Johnson’s one-dose Janssen vaccine.

NBC News is tracking administered doses and how many people are fully vaccinated in U.S. states and territories by surveying health departments and examining daily reports.

This map will be updated weekdays.



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