As NHS braces for record flu cases, is the strain active in continental Europe too?
An early, drifted H3N2 influenza subclade K is driving a prematurely intense northern hemisphere flu season, spreading faster but not causing evidently more severe disease.
Flu is hitting California early. Why doctors worry this year will be especially hard on kids
An early, rising H3N2 subclade K-driven flu season is causing increased cases, wastewater detections, and rising hospital visits in California, threatening young children.