A Shot for the Mind: How the Shingles Vaccine May Shield Against Dementia
A large-scale observational study of over 1.5 million US Medicare beneficiaries aged 65 and older has revealed a compelling association: receipt of the recombinant zoster vaccine (RZV) is linked to a substantially reduced risk of developing new-onset dementia. Over a three-year follow-up period, vaccinated individuals showed a 33% lower incidence of all-cause dementia compared to unvaccinated peers, with similarly robust reductions observed for Alzheimer’s disease and vascular dementia. The findings add to a growing body of evidence suggesting that common viral infections—and the immune responses they provoke—may play a greater role in neurodegenerative processes than previously recognized.
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