#South America

The Mosaico study will enroll gay and bisexual men and transgender people at significant risk for the virus.

Researchers broke down the various strategies that the gay men in the Opposites Attract study used to prevent HIV transmission.

Women in a global study began an HIV treatment regimen based on one of the two drugs after 20 weeks of gestation.

The study of mixed-HIV-status gay couples prompted the CDC to conclude that undetectable people have effectively no risk of passing on HIV.

“There is no medicine in the hospital. My people are dying.”

Two large-scale, multiyear studies of infusions of antibodies as pre-exposure prophylaxis (PrEP) against HIV are beginning this spring.

From 2009 to 2010, the small South American country of Guyana has reduced its HIV/AIDS prevalence to 1 percent, the National Communications Ne...

As with other cataclysmic challenges facing our generation, we must ask ourselves: What cost will generations to come pay for our...

Guyana credits a U.S.-funded AIDS prevention program for shrinking its HIV infection rate from about 3 percent to nearly 1 percent, The Associ...