Alzheimer's warning years ahead? New blood test shows promise

According to the World Health Organisation, more than 57 million people live with dementia worldwide and nearly 10 million are newly diagnosed every year. (Representative image) Credit: kate_sept2004/Getty Images

Doctors say a new blood test could help predict the onset of Alzheimer's disease years before symptoms appear. The test measures a biomarker known as p-tau217, which researchers say can detect signs of the disease five to ten years before otherwise healthy people begin showing symptoms. Experts believe the breakthrough could transform how Alzheimer's is diagnosed and monitored.

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