Overview
- CDC estimates this season have reached about 15 million illnesses, more than 180,000 hospitalizations, and over 7,400 deaths nationwide.
- A mutated H3N2 lineage known as subclade K accounts for over 90% of H3N2 viruses tested, contributing to rapid spread and sustained high activity.
- California confirmed two pediatric flu deaths and the U.S. tally stands at 17 so far this season, with doctors reporting unusually high fevers and more child hospitalizations.
- Hospitals and emergency departments report strain in several states, with record levels noted in places such as New York and steep recent jumps in weekly flu hospitalizations.
- Health agencies say the vaccine’s match to subclade K is reduced but still helps prevent severe outcomes, and they recommend prompt testing and starting antivirals within 48 hours for eligible patients.