Opinion: Blood-based biomarkers for Alzheimer's present complex challenges to health care system

During an annual checkup, the patient says: “Doc, I saw a commercial about a blood test that can tell if I’ll develop Alzheimer’s. I watched my mother go through it. I want to get tested.”

He’s referring to the new Alzheimer’s blood-based biomarkers. Despite not showing any symptoms of Alzheimer’s — he manages his own finances, drives, shops, and cooks elaborate meals for his wife — he’s clearly worried.

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