“Flu continues to bring misery across the US, with all but four states showing high or very high levels of activity as a new virus strain called subclade K continues to spread.

By another measure – visits to the doctor for fever plus a cough or sore throat, which are common flu symptoms – the US is at its highest level of respiratory illness since at least the 1997-98 flu season..."

https://www.cnn.com/2026/01/05/health/flu-highest-level-25-years

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