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.
Influenza vaccine distribution information for the 2017-2018 season is posted here as CDC receives it, typically on Fridays. Please continue to check this page for the most up-to-date information.
Flu vaccine is produced by private manufacturers, so supply depends on manufacturers. For the 2017-2018 season, manufacturers have projected they will provide as many as 151 to 166 million doses of injectable influenza vaccine for the U.S. market. (Projections may change as the season progresses.)
October 27, 2017 5:00 PM ET
|Week||Total Doses Distributed|
|10/20/2017||≈ 130.2 million doses|
|10/13/2017||≈ 123.3 million doses|
|10/06/2017||≈ 117.2 million doses|
|09/29/2017||≈ 104.7 million doses|
|09/15/2017||≈ 73.7 million doses|
- Page last reviewed: October 27, 2017
- Page last updated: October 27, 2017
- Content source:
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)
- Page maintained by: Office of the Associate Director for Communication, Digital Media Branch, Division of Public Affairs