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Flu Season Surged in the US over the Holiday and Already Rivals Last Winter's Harsh Epidemic

A new influenza A H3N2 subclade K variant drives a surge with 45 states reporting high flu activity and over 11 million illnesses this season, CDC says.

  • New government data posted Monday for the week of Christmas showed U.S. flu infections surged over the holidays, already surpassing last winter's epidemic.
  • More than 90% of recent H3N2 cases reveal Subclade K , J.2.4.1), a mutation differing from this season's vaccine strain, and public health experts say it may drive higher hospitalizations.
  • CDC data show at least 11 million illnesses, 120,000 hospitalizations, and 5,000 deaths this season; forty-five states reported high or very high flu activity during the week of Christmas.
  • Healthcare providers and clinics recorded a 6% week-to-week rise in respiratory illness patients, with flu-like visits last month higher than any point last season, while the U.S. Centers for Disease Control and Prevention recommends vaccination for people 6 months and older.
  • Flu seasons often peak in January or February, so it's too early to gauge the vaccine mismatch impact, while the World Health Organization notes notable viral evolution without increased severity.
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72 Articles

Corvallis Gazette TimesCorvallis Gazette Times
+2 Reposted by 2 other sources
Center

Officials: Worst of flu season still to come

NEW YORK — U.S. flu infections surged over the holidays, and health officials are calling it a severe season that is likely to get worse.

Influenza infections in the United States increased during the holidays and the health authorities described it as a serious season that is likely to worsen. New government data published on Monday (on flu activity during Christmas week) showed that, according to some measures, this season is already overcoming the flu epidemic of last winter, one of the hardest in recent history. COVID-19 infections have also been increasing, as shown by other …

·Washington, United States
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Associated Press NewsAssociated Press News
+60 Reposted by 60 other sources
Lean Left

Flu season surged in the US over the holiday and already rivals last winter's harsh epidemic

U.S. flu infections are still surging, and health officials say it's a severe season that's likely to get worse.

·United States
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  • 58% of the sources are Center
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USA Today broke the news in United States on Sunday, January 4, 2026.
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