90% accurate, Blood test that predicts Alzheimer's disease. A blood test that can detect Alzheimer’s disease up to three years before the onset of symptoms has been developed by scientists who believe that it could lead to the early diagnosis of progressive dementia in elderly people. http://www.independent.co.uk/life-style/health-and-families/health-news/scientists-develop-blood-test-to-detect-alzheimers-disease-9180043.html
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