Two vaccines to prevent Kovid-19 infection have now been approved by federal authorities, and thousands of people are vaccinated every day. As of December 21, the Centers for Disease Control and Prevention reported that more than 614,117 initial doses of the two Kovid-19 vaccines had been administered.
A two-dose vaccine, developed by American drugmaker Pfizer and the German firm BioNotech, was previously approved by the Food and Drug Administration for emergency use. The first shipment was made on 13 December. A second vaccine, which was developed by Modern and also required two doses, began shipping vials on 20 December.
NBC News is monitoring the doses administered in each state by surveying health departments and checking daily reports.