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How often do I need to get a flu shot?

Page last updated 11 July 2018

Influenza vaccination needs to be given every year. This is because the flu is always 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

  1. Australian Government, Department of Health, The flu vaccine – Information for consumers in 2018 fact sheet. Available at (accessed 28th April 2018).

SPANZ.SAPAS.18.05.0199 - Date of preparation May 2018