Doctors across the US are preparing for what could be another record-breaking flu season. A new variant is spreading fast, raising concerns that this year may match or even exceed last season’s severe impact. Early signs already point to rising activity across the country.

Health officials report that flu-related doctor visits and positive lab tests are increasing, especially among children and younger adults. Maps tracking national trends show growth in nearly every reporting state, signaling that the virus is gaining momentum earlier than expected.

The biggest worry is a new version of the H3N2 strain known as Subclade K. This variant has spread rapidly in countries like Japan, the UK, and Canada, and is expected to hit the US soon. Experts say it can partially evade the immune system, meaning vaccines may offer less protection than usual.

Vaccination rates continue to slip, adding to the challenge. Fewer children and adults are getting their annual flu shots, leaving large portions of the population vulnerable. Early data shows Subclade K is already appearing in some samples abroad, though its US presence is still being studied.

Hospitals are also watching admissions closely. In early November, flu-related hospitalizations rose five percent in a single week. Although overall levels remain low, both flu and RSV are climbing, especially in states like Alabama and New Hampshire.

Subclade K causes symptoms similar to typical flu, but some reports suggest stronger body aches and faster onset. With its rapid spread and ability to bypass immunity, doctors urge everyone to stay alert and keep vaccinations up to date to reduce severe illness.