When I was a child, the herpes simplex virus was found in my blood tests. A microbiology research institute in my country (as socialist as it could be) gave me an experimental drug. Thirty years passed and I never had a symptom.
They sold the patent to a Western drug company and this particular drug was never marketed. Instead, we have Acyclovir & friends, which "Taken daily, these medicines can lessen the severity and frequency of outbreaks.".