Routine vaccines may cut dementia risk—experts have startling hypothesis on how

Multiple observational studies have found that routine adult vaccines are associated with a reduced dementia risk, with some showing risk reductions of 25% to 40%. Researchers hypothesize that certain vaccine adjuvants activate immune cells and trigger interferon production that reduces amyloid plaque deposits, and that the vaccine adjuvant itself may play a direct role in lowering dementia risk independent of the specific virus targeted. An alternative hypothesis suggests non-specific effects of vaccinations mediated through trained innate immunity may provide a mechanistic explanation.

Source: Ars Technica | 2026-05-15