The US Centers for Disease Control and Prevention’s Dr Tom Clark said that as of Saturday, at least 272,001 doses of the Pfizer/BioNTech vaccine have been administered in the United States

During a meeting of the CDC’s Advisory Committee on Immunization Practices, Clark said that the number was a “minimal estimate,” since there is a lag time in reporting.

Providers are requested to report how many people have been given a vaccine within 72 hours to their local public health office. The public health office then has an additional 24 hours to report that number to the CDC.