Everybody knows that the rate of HIV in people with herpes and other STDs is much higher than in others. It’s those nasty flare-ups—they facilitate transmission, right? Well, new data suggest it’s more complicated than that. Now researchers have found high concentrations of HIV in genital-herpes sores, suggesting that during outbreaks, large amounts of the virus are emitted. The University of Washington study’s head, Dr. Timothy Shacker, advises that wider use of such anti-herpes drugs as acyclovir and famciclovir could lower the risk of transmission by decreasing levels of HIV in the lesions.