Alzheimer’s may sometimes be caused by a herpes virus that travels from the gut to the brain, scientists believe.

Experts in the US found evidence of infections in the post-mortem brains of people who had died with the disease, and think it may be to blame for up to 45 per cent of cases.

The virus implicated, cytomegalovirus or HCMV, is one of nine herpes viruses, although it is not considered a sexually transmitted disease.

https://www.telegraph.co.uk/news/2024/12/19/alzheimers-could-be-caused-by-a-herpes-virus/