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How a rare genetic mutation could unlock new ways to treat or prevent dementia

PBS News Hour - Full Show

Over 55 million people worldwide are living with the devastating reality of dementia, but researchers have now identified some individuals who share a rare genetic predisposition…

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Episode Summary

Over 55 million people worldwide are living with the devastating reality of dementia, but researchers have now identified some individuals who share a rare genetic predisposition to developing a type of this tragic disease. Could studying these families unlock new ways to predict, treat, or even prevent Alzheimer's and dementia? Horizons moderator William Brangham explores…

Published October 2, 2026