Dementia risk doubled by common herpes virus, study finds

Infection with the virus that’s the main cause of cold sores may double a person’s risk of developing dementia, according to a new study. Adding to growing evidence of a link between the two, further research is needed to investigate whether anti-herpes treatment reduces the risk and may open the door to developing new vaccines.

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Flowchart for selection of participants for incident dementia analysis.

Double risk of dementia after mouth ulcer virus: People who have had the herpes virus at some point in their lives are twice as likely to develop dementia compared to those who