Zostavax

1. Zostavax lowers the risk of dementia in humans (approximately 20%).

   “Zostavax vaccination reduced the probability of a new dementia diagnosis by approximately 20% over a seven-year follow-up period”

   Reviewseven-year follow-up period

   The effect of herpes zoster vaccines on incident dementia in England: Protocol for an OpenSAFELY regression discontinuity study

   medRxiv·7 Sep 2026Preprint

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