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WHO: Recommended composition of influenza virus vaccines for use in the 2019-2020 northern hemisphere influenza season

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  • WHO: Recommended composition of influenza virus vaccines for use in the 2019-2020 northern hemisphere influenza season

    It is recommended that egg based quadrivalent vaccines for use in the 2019-2020 northern hemisphere influenza season contain the following:
    • an A/Brisbane/02/2018 (H1N1)pdm09-like virus;
    • an A(H3N2) virus to be announced on 21 March 2019*;
    • 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).
    It is recommended 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.
    * In light of recent changes in the proportions of genetically and antigenically diverse A(H3N2) viruses, the recommendation for the A(H3N2) component has been postponed.
    https://www.who.int/influenza/vaccin...9_20_north/en/

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