The finding is further proof HIV crossed over to humans decades before it turned into a pandemic.
The two international organizations say service disruptions could cause massive suffering.
Attacked by a mob, gay, HIV activist Edafe Okporo fled Nigeria. Listen as he talks about being gay in a country where it is illegal and HIV stigma is huge.
This early ancestor is to blame for passing the bothersome virus onto modern humans.
The U.S. is spending millions of dollars to develop a vaginal ring designed to help prevent HIV.
Commercial drone delivery is both exciting and terrifying, but in two East African nations, it's saving lives.
The African study found that people assessed as “high risk” and offered PrEP were less likely to use it than those who sought it out.