Southern Hemisphere Flu Vaccine 2021 recommendation

2021 Influenza strainsannounced

Flu Vaccine Strains for 2021

Southern Hemisphere influenza season

On the 27th of September 2019, the WHO recommended the composition of influenza virus vaccines for use in Australia and the entire Southern Hemisphere 2020 flu vaccination season.

It was recommended (1) that Quadrivalent Influenza Vaccines (four strains) contain the below strains. There are three changes from the 2019 influenza season.


AIVC recommendations for the composition of influenza vaccine for Australia in 2020:

The Australian Influenza Vaccine Committee (AIVC) met at TGA (Therapeutics Goods Administration), Canberra, on Wednesday 9th October 2019, to recommend influenza viruses to be used in the composition of the influenza vaccines for 2020.

Flu vaccine
Flu Vaccine 2020

The committee recommended that the following viruses be used for influenza vaccines in the 2020 southern hemisphere influenza season. These recommendations align with the recommendations made by the WHO.

Egg-based Quadrivalent influenza vaccines:

  • an A/Brisbane/02/2018 (H1N1)pdm09-like virus;
  • an A/South Australia/34/2019 (H3N2)-like virus;
  • a B/Washington/02/2019-like (B/Victoria lineage) virus; and
  • a B/Phuket/3073/2013-like (B/Yamagata lineage) virus.

Egg-based Trivalent influenza vaccines:

  • an A/Brisbane/02/2018 (H1N1)pdm09-like virus;
  • an A/South Australia/34/2019 (H3N2)-like virus; and
  • a B/Washington/02/2019-like (B/Victoria lineage) virus.


The TGA has accepted the recommendations of the AIVC.

Reference site:


Let the 2021 Flu Season begin!


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