Diseases such as Alzheimer's, Parkinson's, and Huntington's slowly damage the brain by destroying neurons, the cells that carry messages through the nervous system. As these cells are lost, people can experience memory problems, cognitive decline, and movement difficulties that often become severe enough to require constant care.
Current medicines can ease some symptoms, and recent Alzheimer's therapies such as lecanemab and donanemab can slow decline in certa...

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