Seasonal Influenza Vaccine Supply & Distribution

Note: “Prevention and Control of Seasonal Influenza with Vaccines: Recommendations of the Advisory Committee on Immunization Practices — United States, 2021-2022 Influenza Season” has been published. More information on the upcoming 2021-2022 season is also available.

Influenza viruses change from year to year, so influenza vaccines must be updated annually to include the viruses that will most likely circulate in the upcoming season. Once the viruses are selected for the new formulation, private manufacturers produce, test, release and distribute influenza vaccine.

Flu vaccine is produced by private manufacturers, so supply depends on manufacturers. For the 2021-2022 season, manufacturers have projected they will provide as many as 188 to 200 million doses of influenza vaccine for the U.S. market. (Projections may change as the season progresses.) Additional information on vaccine supply and distribution for the 2021-2022 influenza season is available.

Influenza vaccine distribution information for the 2021-2022 season will be posted here as CDC receives it, typically on Fridays. Please continue to check this page for the most up-to-date information.

Table of 2021-22 Seasonal Influenza Vaccine — Total Doses Distributed

Week Total Doses Distributed
9/17/2021 84.8 M
9/10/2021 66.8 M
9/3/2021 53.2 M
Additional Resources