26 February 2021
Recommended composition of influenza virus vaccines for use in the 2021-2022 northern hemisphere influenza season.
It is recommended that quadrivalent influenza vaccines for use in the 2021 - 2022 northern hemisphere influenza season contain the following:
Egg-based Vaccines
an A/Victoria/2570/2019 (H1N1)pdm09-like virus; (EPI_ISL_417210)
an A/Cambodia/e0826360/2020 (H3N2)-like virus; (EPI_ISL_806547)
a B/Washington/02/2019 (B/Victoria lineage)-like virus; (EPI_ISL_352076) and
a B/Phuket/3073/2013 (B/Yamagata lineage)-like virus. (EPI_ISL_168822)
Cell- or recombinant-based Vaccines
an A/Wisconsin/588/2019 (H1N1)pdm09-like virus; (EPI_ISL_404460)
an A/Cambodia/e0826360/2020 (H3N2)-like virus; (EPI_ISL_944639)
a B/Washington/02/2019 (B/Victoria lineage)-like virus; (EPI_ISL_347829) and
a B/Phuket/3073/2013 (B/Yamagata lineage)-like virus. (EPI_ISL_161843)
It is recommended that trivalent influenza vaccines for use in the 2021-2022 northern hemisphere influenza season contain the following:
Egg-based Vaccines
an A/Victoria/2570/2019 (H1N1)pdm09-like virus; (EPI_ISL_417210)
an A/Cambodia/e0826360/2020 (H3N2)-like virus; (EPI_ISL_806547) and
a B/Washington/02/2019 (B/Victoria lineage)-like virus. (EPI_ISL_352076)
Cell- or recombinant-based Vaccines
an A/Wisconsin/588/2019 (H1N1)pdm09-like virus; (EPI_ISL_404460)
an A/Cambodia/e0826360/2020 (H3N2)-like virus; (EPI_ISL_944639) and
a B/Washington/02/2019 (B/Victoria lineage)-like virus. (EPI_ISL_347829)
Source: World Health Organization