Seasonal Influenza Vaccine Supply & Distribution

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. Vaccine manufacturers have projected that they will supply the United States with as many as 156.2 million to 170 million doses of influenza vaccines for the 2023-2024 season. These projections may change as the season progresses. All flu vaccines for the 2024-2025 season will be trivalent (three component). Most will be thimerosal-free or thimerosal-reduced vaccine (91%), and about 21% of flu vaccines will be egg-free.

Influenza vaccine distribution information for the 2023-2024 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 2023-24 Seasonal Influenza Vaccine — Total Doses Distributed

Additional Resources