NEWSWEEK: Dementia and Gum Disease: Alzheimer's Linked to Gingivitis

Studies in the past have also associated the little-understood disease to the virus which cases herpes.

Ruth Itzhaki, author of one such study published in Frontiers in Aging Neuroscience and a professor in the Division of Neuroscience and Experimental Psychology at the University of Manchester, U.K., said last year: "HSV1 could account for 50 percent or more of Alzheimer's disease cases.

"Despite the involvement of a virus, the [Alzheimer's] disease is apparently not contagious," she told Newsweek.

https://www.newsweek.com/dementia-gum-disease-alzheimers-linked-gingivitis-1301552