Since there seem to be a strong interest in diabetes community.

Please also see:

Gum disease–causing bacteria could spur Alzheimer’s (sciencemag.org) https://news.ycombinator.com/item?id=18987015

Association of Type 2 Diabetes with Titanium Dioxide Crystals in the Pancreas (acs.org) https://news.ycombinator.com/item?id=17362137

Some studies show an association between the herpes virus and Alzheimer’s (theconversation.com) https://news.ycombinator.com/item?id=18265115