Herpes virus is present in most of us, even if we are not aware of it. A large study found that its presence increases the risk of the incurable disease Alzheimer's.
Estimates today are that approximately 90% of the adult population in developing countries has been exposed to herpes type 1. In developed countries, the rate of exposure to the virus reaches approximately 50% of. the population, whether they know it or not, that is, their immune system was exposed to the pathogen at some point in the past.