Beer drinkers could be at higher HIV risk from oral sex, UCLA researchers report. In a test tube, mouth cells mixed with HIV and a 4 percent alcohol solution (similar to most beers) contracted the virus six times faster. Actual boozers, however, weren’t tested.

Male circumcision halves female-to-male HIV transmission, a Kenyan study reports. For five years, researchers tracked cut and uncut truckers having multiple sex partners. For uncut men, infection risk was 2.49 times higher. Researchers blame HIV target cells in the foreskin.