What Causes Alzheimer's? Scientists Are Rethinking the Answer. (Pt 2)

If plaques of amyloid protein in the brain aren’t the root cause of Alzheimer’s disease, what is? Researchers investigating alternative possibilities have faced resistance from the biomedical establishment for decades, but intriguing theories about the role of defects in protein processing and the immune system have emerged. (Part 2 of two episodes.)

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