How one woman became the exception to her family’s Alzheimer’s history

Their story may point to new ways to stop the memory-robbing disease

Alzheimer's patients

In Colombia, Oderis Villegas (center), who is showing signs of Alzheimer’s, and his sister Maria Elsy (left), whose disease is more advanced, meet with neurologist Francisco Lopera (right) in this 2010 photo.

Todd Heisler/The New York Times/Redux Pictures

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