Influenza (Flu) viruses are constantly evolving & changing. The annual vaccine strains need to change to best match the current circulating virus strains. Annually, the World Health Organisation recommends strains for our Southern Hemisphere vaccine, based upon international surveillance of circulating viruses. The Australasian experts then get together and review our local data and epidemiology, and agree on which four strains will be in the upcoming vaccine.

Vaccines are made in Melbourne Australia, at the Seqirus laboratory, and kept between 2 and 8 degrees Celcius from the time of manufacture, during transportation and storage, and until they are administered into your arm.

Three of the four strains in the 2020 vaccine are new. The Phuket strain has previously been in our Southern Hemisphere vaccine. The 2020 strains are as follows;

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

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