what type of flu is going around

Right now in early 2026, the main flu type “going around” in many places is influenza A, especially the H3N2 strain, with a newer offshoot called subclade K getting a lot of attention.

What type of flu is circulating?

• Most lab-confirmed cases in recent weeks have been influenza A rather than influenza B, with H3N2 the dominant subtype in many regions.

• Within H3N2, a newer variant nicknamed “subclade K” has driven early, intense flu waves in countries like Australia, Japan, the UK, and Canada and is now spreading in the US as well.

• H1N1 is still present and has been significant in some Southern Hemisphere data, but experts expect H3N2 (including subclade K) to lead much of the current Northern Hemisphere season.

How serious is this season?

• Seasons dominated by H3N2 tend to cause more severe illness and hospitalizations in older adults and people with underlying medical conditions.

• Early reports from late 2025 showed rapid growth in flu-related doctor visits and hospitalizations in some US states, with curves described as “J‑shaped,” meaning cases and severe outcomes are rising faster than usual.

• Public health specialists warn that lower flu-shot uptake plus this new H3N2 variant could make this another tough season, even for otherwise healthy adults.

What about the current flu shot?

• This year’s flu vaccine still targets influenza A (H1N1 and H3N2) and B strains, but subclade K appeared after vaccine strain selection, so the match to this new “twig” on the H3N2 “tree” is not perfect.

• Even with some mismatch, vaccination is still expected to reduce the risk of severe disease, hospitalization, and death, especially in high‑risk groups.

• Experts are watching effectiveness data closely, but the strong recommendation remains: if not vaccinated yet, getting the shot is still worthwhile this season.

Practical steps if flu is going around near you

• Consider getting a current-season flu shot (and other recommended respiratory vaccines) as soon as possible, especially if you are older, pregnant, immunocompromised, or have chronic conditions.

• Use basic precautions when local flu activity is high:
  • Stay home if you develop fever, cough, sore throat, or body aches.
  • Mask in crowded indoor spaces and improve ventilation when possible.
  • Wash hands often and avoid close contact with sick people.
• If you are high risk or very unwell, contact a clinician early; antiviral medications work best if started within about 48 hours of symptom onset.

Quick forum-style takeaway

People asking “what type of flu is going around” right now are mostly running into an influenza A season, heavy on H3N2, with a newer “K” offshoot that has sped up outbreaks and made the season feel rough in some areas.

If you share your country or region, a more tailored snapshot of what’s circulating locally can be added, but the broad headline at the moment is: influenza A H3N2, especially subclade K, is leading the current wave.

Information gathered from public forums or data available on the internet and portrayed here.