Flu shot lowers dementia risk:

Your flu shot is linked to more than a week of staying out of bed. In a study of 1.8 million adults 65 and older, those who got at least one flu vaccine were 40 percent less likely to develop Alzheimer’s over the next four years, and a 2025 meta-analysis found that people at higher risk who got more than four shots reduced their dementia risk by 57 percent.

Shingles, RSV and Tdap vaccines are tied to lower dementia risk too. Rolling up your sleeve