A deadly strain of influenza, H3N2, is spreading rapidly and is expected to hit Australians hard this winter.
Health experts say H3N2, which includes the emerging “Super K” variant, is commonly linked to severe seasonal outbreaks, high hospitalisation rates, and increased deaths.
According to health data, seasons dominated by H3N2 across the world have historically recorded higher mortality rates.
The Australian Centre for Disease Control has reported more than 32,500 laboratory-confirmed flu cases so far this year, with around 75.6% identified as H3N2.
About 20% of those infected are adults over 65, who are considered the most vulnerable group to this strain.
Austin Health associate professor Michael Woodward said H3N2 infections can be particularly dangerous for older people, often leading to hospitalisation and, in severe cases, death.
He warned that while flu is often dismissed as a minor illness, it can be much more serious for the elderly.
He advised Australians, especially those over 65, to consult healthcare professionals about reducing their risk if H3N2 continues to dominate the season.
Common symptoms include high fever, chills, body aches, persistent dry cough, and headaches.
Health experts have also urged people to ensure they are up to date with flu vaccinations, as prevention remains the most effective protection.
However, vaccination rates have declined nationwide, with only about one in three Australians receiving the flu shot, compared to more than half before the COVID-19 pandemic.
Low immunisation levels contributed to a particularly severe flu season last year, which saw 1,701 deaths—about 400 more than Australia’s national road toll.
