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Cold Sores Linked to 80% Increased Alzheimer’s Risk

5/24/2025

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Summary

Story summary

A groundbreaking study in BMJ Open reveals a startling connection between cold sores, caused by the herpes simplex virus type 1 (HSV-1), and a heightened risk of Alzheimer’s disease. Among over 344,000 participants, those with HSV-1 faced an 80% greater chance of developing Alzheimer’s. Remarkably, anti-herpetic treatments could lower this risk by 17%, highlighting an urgent need for public health initiatives aimed at herpes prevention.

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Story summary

A groundbreaking study in BMJ Open reveals a startling connection between cold sores, caused by the herpes simplex virus type 1 (HSV-1), and a heightened risk of Alzheimer’s disease. Among over 344,000 participants, those with HSV-1 faced an 80% greater chance of developing Alzheimer’s. Remarkably, anti-herpetic treatments could lower this risk by 17%, highlighting an urgent need for public health initiatives aimed at herpes prevention.