Researchers working in Lesotho found that offering lottery tickets to volunteers who test negative for sexually transmitted infections is a powerful motivator for safe sex.
With her shy charm and sunny smile, she makes viewers realize that behind the label "sex worker" there's a sweet young mom, just trying to feed her kids.
The rise in heroin use in the town of Turners Falls, Mass., has led to another problem: a proliferation of discarded hypodermic needles. Police can't keep up, so they've asked residents to help.
Some drug users in Philadelphia are reselling syringes they get for free at needle exchanges. That's illegal, but researchers say the practice still helps prevent the spread of diseases like HIV.
The rising star was the first Nigerian to come out on national TV, was nearly beaten to death in his home and is now an international activist for LGBT rights and for men with HIV.
Ruth Coker Burks has no medical training but has spent decades caring for people with AIDS. "I've buried over 40 people in my family's cemetery," she says, "because their families didn't want them."
In parts of southern Africa, HIV has picked up mutations that slow down its ability to grow inside a person's blood. That's a good sign. But will it be enough to make a difference in the epidemic?
Citing reduced risk of HIV and other sexually acquired diseases, the federal agency says health care providers should discuss circumcision with men as well as parents of infants and teen boys.