There's a theory that amyloid-beta plaques are protective reactions to encapsulate infections, which go out of control in Alzheimer's. As people age, the blood-

There's a theory that amyloid-beta plaques are protective reactions to encapsulate infections, which go out of control in Alzheimer's. As people age, the blood-brain barrier weakens, allowing more viral particles in. This is why people with herpes are at higher risk. https://www.sciencedaily.com/releases/2018/07/180705143920.htm https://www.sciencedaily.com/releases/2018/07/180705143920.h...