Alzheimer’s disease is a progressive brain disorder that gradually destroys a person’s memory and mental functioning, including the ability to reason, learn, and communicate. It may also be marked by changes in personality and behavior, including increasing anxiety, agitation, and delusion. Alzheimer’s disease is the most common form of dementia, which is the general term for a number of conditions marked by impaired brain functioning. More than 5 million people in the United States have been diagnosed with Alzheimer's. The course of Alzheimer’s disease may last just a few years or be as long as 20 years. On average, an Alzheimer’s patient will live eight years after their diagnosis.
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