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    Infectious Disease Prevention Section
    Mail Code: 1927
    PO BOX 149347 - Austin, TX 78714-9347
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    Austin, TX 78714

    Phone: (512) 776-7676
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Composition of the 2017-2018 Seasonal Influenza Vaccine

It was recommended that trivalent vaccines for use in the 2017-2018 influenza season (Northern Hemisphere winter) contain the following:

  • an A/Michigan/45/2015 (H1N1)pdm09-like virus;
  • an A/Hong Kong/4801/2014 (H3N2)-like virus;
  • a B/Brisbane/60/2008-like virus.

It was recommended that the quadrivalent vaccines containing two influenza B viruses contain the above three viruses and a B/Phuket/3073/2013-like virus. Global laboratory surveillance for influenza viruses is the basis for changing one or more of the vaccine strains each year.

Vaccine Information Statements (VISs)

WHO Recommended Composition of Influenza Virus Vaccines for Use in the 2017-2018 Northern Hemisphere Influenza Season
How to find influenza vaccine

For the public:

For providers:

Influenza Vaccine Availability Tracking System (IVATS) 
National Adult and Influenza Immunization Summit
Enables providers to determine which wholesale distributors or manufacturers have seasonal influenza vaccine in stock for sale or on order.

Last updated January 12, 2021