Influenza activity in Australia has been higher than usual this year, partly due to a fast‑spreading influenza strain (H3N2 Subclade K). Dr Nenad Macesic, Spleen Australia medical lead, expects cases to rise as we move into winter.
Getting vaccinated early is important and especially so for people living without a functioning spleen, who are at higher risk of complications and serious illness.
What’s new in the 2026 flu vaccine?
The vaccine has been updated to better match the strains expected to circulate this year, including the newer H3N2 “Super‑K” strain. Even if the flu changes from year to year, vaccination still greatly reduces the risk of severe illness and hospitalisation.
When should I get vaccinated?
Best time: April–May
Protection starts: 10–14 days after the shot
Strongest protection: First 3–4 months If you had a flu shot in late 2025 or early 2026, you still need the 2026 vaccine.
Free flu vaccines in 2026
National Immunisation Program: Free for people without a functioning spleen.
Protecting yourself and others
Encourage family, close contacts, and carers to get vaccinated too—it helps reduce your exposure.
Your flu vaccine appointment is also a good time to check if you’re up to date with other important vaccines for people without a spleen, such as pneumococcal, meningococcal, and Haemophilus influenzae type B (Hib).
For personalised advice, speak with your GP or contact Spleen Australia.
Phone: (03) 9076 3828
Email: spleenaustralia@alfred.org.au
June 1, 2026