Detecting Alzheimer’s before it happens

A blood test that can predict with 90% certainty whether a cognitively healthy elderly person will develop dementia symptoms could soon be a reality, researchers say.

Scientists have long known that early diagnosis offers the best chance for treating the disease, but the financial and practical feasibility of such a test has eluded them until now.

Most approaches to fluid-based biomarker discovery have focused on cerebrospinal fluid tau and amyloid-B levels but the predictive value of

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