Alzheimer's patient (left) with her daughter. Alzheimer's disease is a neurodegenerative disease and a common cause of dementia in the elderly. It is

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Alzheimer's patient (left) with her daughter. Alzheimer's disease is a neurodegenerative disease and a common cause of dementia in the elderly. It is caused by the formation of protein plaques in the brain. The symptoms include memory loss, personality changes and confusion.

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Photo credit: © TONY CRADDOCK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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