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First Alzheimer’s vaccine human trial set to begin at Boston hospital

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The Brigham and Women’s Hospital in Boston is launching the first ever human trial for an Alzheimer’s vaccine, saying the nasal vaccine “could prevent and slow the progression” of the disease. Professor of neurology at Brigham and Women’s Hospital, Dr. Howard Weiner, who is also leading those trials, joins News NOW to explain how the vaccine works against Alzheimer’s disease.