THURSDAY, June 19 (HealthDay News) -- The herpes drug aciclovir (Zovirax) doesn't reduce the risk of HIV-1 infection in people who have sex with men infected with genital herpes, a U.S. study finds.
Previous research has shown that herpes simplex virus type-2 (HSV-2) infection -- the most common cause of genital herpes -- increases the risk for HIV-1 infection by two- to threefold.