Fortune ran a good summary of this story, explaining how normal brains “get rid of a certain amount of inactive synapses…but the infected mini brains showed unnecessarily and inordinate levels of the clean-up process, similar to the level seen in neurological disorders like schizophrenia, Alzheimer’s, and Parkinson’s disease.” In other words, your brain starts killing off those internet connections that help your brain cells communicate. That’s why a third of people who get Covid wind up having problems thinking and concentrating later.

Key takeaway: Covid eats your brain.