Centers for Disease Control and Prevention (CDC) COVID-19 Vaccination

Description:

The CDC posts daily data updates on COVID-19 vaccination administration and state distribution, assembled from data reported by state public health agencies and offices. Healthcare providers report doses administered to federal, state, territorial, and local agencies within 72 hours of administration, but there could be an additional lag before data reaches the CDC. Each entity may use various reporting methods, including immunization information systems, Vaccine Administration Management System, which supports temporary, mobile, and satellite clinics, in addition to direct submissions. The CDC’s data might differ from state systems and dashboards due to unfound duplicates during the agency’s data consolidation or due to varying reporting practices. Visit https://covid.cdc.gov/covid-data-tracker/#vaccinations to see data validation and collection protocols.

Doses delivered and administered for U.S. States, D.C., and Puerto Rico are cumulative counts of COVID-19 vaccine doses reported to the Federal COVID Vaccine Operation delivered since December 14, 2020. Doses delivered to the U.S. Virgin Islands, Palau, Micronesia, Marshall Islands, Guam, American Samoa, and Northern Marianas Islands include those marked as shipped in CDC’s Vaccine Tracking System (VTrckS) since December 13, 2020. Doses delivered and administered in a state or territory also include those delivered and administered in pharmacies and the Federal Pharmacy Partnership for Long-Term Care (LTC) Program in the jurisdiction as reported in VTrckS. Doses administered are attributed to the jurisdiction in which the vaccine was administered.

People receiving one or more doses represent the total number of people who have received at least one vaccine dose. People receiving two doses represent the number of people who have received a second dose of the vaccine. The number of people receiving one or more doses and the number of people receiving two doses was determined based on CDC’s information by state, territorial, and local public health agencies and federal entities on dose number, administration date, recipient I.D, and date of submission. A dose number was determined for nearly all reported doses administered; some missing data for dose number resulted in people receiving one or more doses and people receiving two doses not equaling the total doses.

Rates per 100,000 represent the number of total doses delivered, the number of total doses administered, the number of people receiving one or more doses, and people receiving two doses per 100,000 residents of all ages. These metrics use the U.S. Census Bureau Annual Estimates of the Resident Population for the United States and Puerto Rico, 2019. 2018 U.S. Census Bureau population estimates and estimates from the CIA World Factbook are used for American Samoa, Federated States of Micronesia, Guam, Northern Mariana Islands, Republic of Palau, Marshall Islands, and U.S. Virgin Islands. Emergency Use Authorization has been granted for using the Pfizer-BioNTech vaccine among persons aged 16 and older and using the Moderna vaccine among persons aged 18 and older. Therefore, vaccine use is limited among those under age 18, representing approximately 22% of the U.S. population. Jurisdictions may use more targeted population counts for the denominators in their rate calculations (i.e., persons over 18 or over 16 years old), resulting in values different from those reported on the CDC COVID Tracker. In some limited circumstances, people might receive vaccinations outside of their state or territory of residency. These rates currently account for vaccinations occurring in the jurisdiction where the vaccination was administered.

Occasionally, states will overreport or underreport vaccine administration and distribution causing “Insufficient Data” to appear on the map for Change in number of people who are fully COVID-19 vaccinated, and Percent change in people who are fully COVID-19 vaccinated indicators.