Overview
- CDC estimates at least 4.6 million illnesses, 49,000 hospitalizations and 1,900 deaths so far this season.
- Genetic testing shows roughly 90% of recent H3N2 samples belong to subclade K, now the dominant strain in U.S. circulation.
- Fourteen states report high or very high respiratory illness levels, with New York flu hospitalizations jumping 75% in a week and some pediatric units at capacity.
- Young children are bearing the brunt of illness, and three pediatric flu deaths have been reported to date.
- Experts describe a partial vaccine mismatch but say shots still curb severe outcomes, urging vaccination, prompt antivirals within 48 hours, and basic precautions during holiday travel.