Early U.S. flu season, current strain may signal risk for younger people; doctors urge shots

Health officials are urging Americans to get vaccinated against the flu due to an early rise in cases and a new mutation in the H1N1 strain. Experts are particularly concerned that younger people may have less immunity to this specific variant.
Why it matters
Early flu activity and viral mutations can lead to more severe outbreaks, placing increased pressure on public health systems and individual health outcomes.
Early U.S. flu season, current strain may signal risk for younger people; doctors urge shots left Flu activity is low but has been on the rise since late August, CDC data show |Image used for representational purpose only AP AP https://th-i.thgim.com/public/incoming/x2s3hz/article71604386.ece/alternates/FREE_1200/Vaccines_69_14.jpg Matt Rourke A caregiver administers a flu vaccine at the Montgomery County Office of Public Health Upper Merion Township Community Clinic in King of Prussia, Pa., Monday, Oct. 19, 2026. (AP Photo/Matt Rourke) Scientists say new mutation may leave younger people less protected. Just 58 million U.S. adults got a flu shot last season vs 75 million in 2019-20.
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