Which strains of the influenza virus are covered by this year’s vaccine?
The influenza virus has many strains. The World Health Organization monitors the different influenza strains and their movements around the world. They then decide what strains are likely to circulate in the Southern Hemishphere and recommend the influenza strains to be included in the influenza vaccine.
The influenza strains included in the 2021 influenza vaccines are:
- A/Victoria/2570/2019 (H1N1)pdm09-like virus
- A/Hong Kong/2671/2019 (H3N2)-like virus
- B/Washington/02/2019-like virus
- B/Phuket/3073/2013-like virus