Vaccination led to a 20 percent reduction in dementia risk in Wales Hailshadow/Getty Images " data-image-caption=" A shingles vaccine might have an unexpected benefit, potentially reducing the risk of being diagnosed with dementia. " data-medium-file="https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2025/04/040225_av_zoster-dementia_feat.jpg?fit=680%2C383&ssl=1" data-large-file="https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2025/04/040225_av_zoster-dementia_feat.jpg?fit=800%2C450&ssl=1"> A shingles vaccine might have an unexpected benefit, potentially reducing the risk of being diagnosed with dementia. People who receive the live-attenuated shingles...