New test may help detect Alzheimer's earlier

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New test may help detect Alzheimer's earlier

New test may help detect Alzheimer's earlier
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New test may help detect Alzheimer's earlier

by CBSTV Videos 1:20 mins

More than 5 million people in the U.S. are living with Alzheimer's. Now British researchers say they have developed a blood test that could reveal early changes in the brain related to the disease - before a patient has symptoms. CBS News' Alphonso Van Marsh reports.

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