Alzheimer's disease (AD) is a neurodegenerative disease that usually starts slowly and progressively worsens.[2] It is the cause of 60–70% of cases of dementia.[2][11] The most common early symptom is difficulty in remembering recent events.[1] As the disease advances, symptoms can include problems with language, disorientation (including easily getting lost), mood swings, loss of motivation, self-neglect, and behavioral issues.[2] As a person's condition declines, they often withdraw from family and society.[12] Gradually, bodily functions are lost, ultimately leading to death.[13] Although the speed of progression can vary, the typical life expectancy following diagnosis is three to nine years.

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