New Flu Variant Sparks Concern Amid Rising US Cases
TL;DR Summary
A new influenza A(H3N2) subclade K is spreading globally, first detected in August 2025, with increasing cases in over 34 countries. While it does not appear to cause more severe symptoms, health officials are closely monitoring its evolution. Seasonal flu vaccines continue to offer protection against severe illness and hospitalization, and ongoing surveillance is essential to track the virus's spread and impact.
- ‘Super flu’ variant is circulating and raising concern. Here’s what to know about it Dallas News
- The New Flu Variant Could Spread Widely This Year. Here’s What to Know. The New York Times
- Weekly US Influenza Surveillance Report: Key Updates for Week 49, ending December 6, 2025 | FluView Centers for Disease Control and Prevention | CDC (.gov)
- New Flu Variant May Be Triggering Spike in Severe Disease Scientific American
- Flu cases are on the rise in the US. Here's what you need to know ABC News
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