Both Type 1 and Type 2 diabetes have been linked to Alzheimer’s/ senile dementia. This fascinating study, for the first time, shows a possible causal link between HSV1 (herpes) virus and Alzheimer’s:
antiherpetic medication prevented later SD development in 90% of [the] study group.
Here is a broader comment article by the main author, Ruth Itzhaki:
I have found the strongest evidence yet that the herpes virus is a cause of Alzheimer’s, suggesting that effective and safe viral drugs might be able to treat the disease. We might even be able to vaccinate our children against it.