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Sep 22, 2025Unlike measles or polio vaccines, which last a lifetime, the flu virus mutates constantly, so we need a new shot every year. This year’s quadrivalent vaccine targets four strains... -
Sep 19, 2025Unlike measles or polio vaccines, which last a lifetime, the flu virus mutates constantly, so we need a new shot every year. This year’s quadrivalent vaccine targets four strains...
