Alzheimer’s Spreads Like a Virus in the Brain, Studies Find

Alzheimer’s disease seems to spread like an infection from brain cell to brain cell, two new studies find. But instead of viruses or bacteria, what is being spread is a distorted protein known as tau. Alzheimer’s Spreads Like a Virus in the Brain, Studies Find
Phys Ed: Exercise as Housecleaning for the Body - nytimes