'Super flu' hits highest level in US in 25 years
New York Post••general
Key Points:
- The US is experiencing its highest flu infection rate in nearly 30 years, driven by the spread of the subclade K strain, with 30 states now in the CDC's highest flu activity tier.
- New York is particularly affected, recording the highest number of flu hospitalizations in a single week from Dec. 26, 2025, to Jan. 2, 2026, with a significant surge in emergency room visits for flu symptoms.
- Flu vaccinations have declined notably, with only 48 million adults and 42% of children vaccinated this season, contributing to increased susceptibility amid a less effective vaccine estimated at 32%-39% efficacy in adults.
- Hospitalizations are at their highest since 2010
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