US researchers develop Alzheimer's test

Scientist say test can predict whether a person will develop the disease within three years.

    Researchers in the United States say they have discovered a blood test for Alzheimer's.
     
    They say it can predict, with more than 90 percent accuracy, whether a person will develop the disease within three years.
     
    Al Jazeera's science correspondent Tarek Bazley explains.

    SOURCE: Al Jazeera


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