Today, people over 50 make up the second-largest group of South Africa's HIV-positive population. Twenty years ago, they were the smallest proportion. As people age, their chances for developing ...

Recent years have seen a 12 percent decline in new HIV infections. Cuts to federal funding could upend that progress.

A little over two decades ago, addressing Nigeria's HIV crisis topped U.S. President George W. Bush's priorities. Africa's most populous nation had 3.5 million HIV cases, and the disease threatened to ...