Hill December 29, 2025
Rob Taub, Alix Martichoux

(NewsNation) — As the winter season fully kicks in, it’s expected that people across the country will get sick. Except this time, a new variant of the influenza virus has sounded the alarm — and earned the nickname “super flu.”

The “super flu” is a variant of influenza A H3N2 called subclade K. In the past, H3N2 influenza has been more severe and taken longer to recover from.

According to the Centers for Disease Control and Prevention, the super flu first made headlines in the United Kingdom, before making its way over the Atlantic to the U.S.

“The United Kingdom got hit pretty hard by this,” as did Europe and Australia, said Neil Maniar of Northeastern University. “I think that’s...

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