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The Boston Globe

Nation

Studies shed light on Alzheimer’s spread

NEW YORK - 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.

The finding answers a longstanding question and has immediate implications for developing treatments, researchers said. And, they said, they suspect that other degenerative brain diseases, like Parkinson’s, may spread in the brain in a similar way.

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