Undetectable equals untransmittable (U=U) has improved HIV prevention and tackled stigma, but there are still a few questions to answer.

Results from the PARTNER2 study, presented by Alison Rodger at AIDS 2018, yielded an equivalent level of confidence for gay men as it had for heterosexual couples in the original PARTNER study several years ago.

HIV-positive individuals with a viral load below 200 while on antiretroviral therapy did not transmit HIV to steady sex partners during more than one year of condomless sex.

Antiretroviral treatment as prevention (TasP) in Denmark could nearly eliminate the HIV epidemic among men who have sex with men (MSM), according to predictions of a Bayesian back-calculation model.

Interim analyses from two important studies clearly demonstrated that ART and an undetectable viral load is a highly effective HIV prevention strategy for heterosexual and gay male serodiscordant couples.

Final results revealed a 93% reduction in sexual HIV transmission within serodiscordant couples when the individual with HIV was taking antiretroviral therapy.

In a well-designed and rigorously executed clinical trial, people living with HIV who started antiretroviral therapy had a significantly lower risk of transmitting the virus to their partners compared to those assigned to wait to start HIV treatment....

This updated guideline is a comprehensive compilation of new and longstanding federal recommendations about biomedical, behavioral, and structural interventions that can help reduce the risk of HIV transmission from persons with HIV by reducing their...

There is no shortage of depressing statistics when it comes to HIV prevention in the United States: 50,000 new HIV infections annually; a 12% increase in new infections among gay and bisexual men and transgender women between 2008 and 2010; an estima...

If a major study found "zero" cases of HIV transmission among mixed-status couples, why did it also find that the risk was higher than zero?