US sees spike in flu cases in December, after most severe season since 2018
Not clear whether more people will get the flu this season, but more than 3,100 people have died in last year in US
TL;DR
- Influenza cases in the US have climbed significantly in December, following the most severe flu season since 2018.
- Over 3,100 people died from the flu in the US in the year ending August 2025.
- A new variant, subclade K, has emerged, and Europe saw an earlier, more intense flu season.
- By December 20, an estimated 7.5 million cases and 81,000 hospitalizations were recorded in the US, a 25% weekly increase.
- Thirty-two states are experiencing high or very high levels of flu illness.
- Experts recommend vaccination, especially for children and older adults, despite potential reduced protection against the new variant.
- Fewer flu vaccines have been distributed this year compared to the same point last year.
- At-home flu tests are available at pharmacies for early detection and potential treatment.