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 have never been infected. A new study from Uppsala University confirms previous research on whether herpes can be a possible risk factor for dementia. The researchers studied 1,000 70-year-olds from Uppsala over a period of 15 years. The study, now published in the Journal of Alzheimer’s Disease, found that people who had been infected with the herpes simplex virus at some point in their lives were twice as likely to develop dementia, compared to those who had never been infected. The herpes simplex virus is very common and up to 80 percent of Swedish adults may be infected. The infection is lifelong, but the symptoms can come and go over different periods of life. Many people never get any symptoms linked to their infection. “What’s special about this...