Vaccinations

I got the first dose on my shingles vaccinations yesterday.

Aside from the hopes of averting that disease itself, apparently there's some small degree of benevolent knock-on effect against dementia too.

https://med.stanford.edu/news/all-news/2025/03/shingles-vaccination-dementia.html

https://www.cbc.ca/news/health/shingles-vaccine-dementia-wales-1.7500368

You'll certainly want to do some additional digging into this on your own to be more certain.