A study of nearly 200,000 adults over 65 found that receiving the high-dose flu vaccine was associated with a 55% lower risk of developing Alzheimer's disease compared to the standard-dose shot. The high-dose formulation contains four times the antigen, which may trigger a more robust immune response in aging bodies.
It is an observational link, not proof of causation, so the immune benefit might be a proxy for other healthy behaviors. Still, if a routine annual shot offers unexpected neuroprotective value, it changes the cost-benefit calculation for seniors.
more: https://www.sciencedaily.com/releases/2026/11/261105224609.htm
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