How often do I need to get a flu shot?
Influenza vaccination needs to be given every year. This is because the influenza virus is constantly changing, so the vaccine changes too. In addition, the immunity provided by the vaccine wanes over time.
In Australia, the flu vaccine generally becomes available in April each year, in advance of the peak flu season of June through to September.
Sources & Citations
8. Victorian Government. Better Health. Flu (influenza) – immunisation. Available at: https://www.betterhealth.vic.gov.au/health/healthyliving/flu-influenza-immunisation (accessed 21 May 2020).
MAT-AU-2000013 - Date of preparation June 2020