All WHO Strain Recs Now Selected for 2019-20 Flu Season

UPDATED: April 5, 2019

The World Health Organization (WHO) has finalized all of their influenza vaccine strain recommendations for the 2019-2020 northern hemisphere flu season.

It is recommended that quadrivalent vaccines for use in the 2019-2020 northern hemisphere influenza season will contain the following:

• an A/Brisbane/02/2018 (H1N1)pdm09-like virus;
• an A/Kansas/14/2017 (H3N2)-like virus;*
• a B/Colorado/06/2017-like virus B/Victoria/2/87 lineage); and
• a B/Phuket/3073/2013-like virus (B/Yamagata/16/88 lineage).

WHO recommends that the influenza B virus component of trivalent vaccines for use in the 2019-2020 northern hemisphere influenza season be a B/Colorado/06/2017-like virus of the B/Victoria/2/87-lineage.

* The A(H3N2) component was recommended on March 21, 2019, postponed approximately one month past the original planned strain selection date of February 21, 2019. For more details on this postponement of the H3N2 strain, please read Frequently Asked Questions to the H3N2 component of the recommendation.

For more information, visit:

Addendum to the recommended composition of influenza virus vaccines for use in the 2019-2020 norther hemisphere season

2019-2020 Vaccines - Order Now!

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