More than 40 million people worldwide suffer from Alzheimer's disease, and that number is expected to increase dramatically in the coming years. But no real progress has been made in combating the disease since its classification more than 100 years ago. Scientist Samuel Cohen shares a new breakthrough in Alzheimer's research from his lab, as well as a message of hope. "Alzheimer's is a disease," Cohen says, "and we can cure it."
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