Influenza (Flu)| Vaccine

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Composition of the 2017-2018 Seasonal Influenza Vaccine

It was recommended that trivalent vaccines for use in the 2017-2018influenza 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 wasrecommended that the quadrivalent vaccines containing two influenza B virusescontain the above three viruses and a B/Phuket/3073/2013-like virus. Global laboratory surveillance for influenza viruses is the basisfor changing one or more of the vaccine strains each year.


Vaccine Information Statements(VISs)


WHO Recommended Composition of Influenza Virus Vaccines for Use inthe 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 manufacturershave seasonal influenza vaccine in stock for sale or on order.