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Blood Test Predicts Alzheimer's Symptom Onset Within Three to Four Years

Feb 20, 2026

Researchers at Washington University School of Medicine developed a blood test-based method to predict when Alzheimer's symptoms will begin, with accuracy within three to four years, using plasma p-tau217 protein levels.

Blood Test Clock Model Predicts Alzheimer's Symptom Onset Within 3-4 Years

Feb 19, 2026

A single blood test measuring p-tau217 protein can predict when cognitively unimpaired individuals will develop Alzheimer's symptoms, with a margin of error of 3-4 years, potentially accelerating clinical trials.