See first: Virus-driven downsizing of the human brain (5) Scientists may need to seriously reconsider the cast-aside hypothesis that pathogens can play a part in diseases such as Alzheimer’s and Parkinson’s. 3/1/19 “Viruses are often ignored in relation to neurodegenerative diseases,” Yale University neurobiologist Anthony van den Pol tells The Scientist. “That’s in part because there’s no clear sign that a virus causes a neurodegenerative disease. But it might.” Some viruses can enter the body through the nose and mouth…