Lancet https://doi.org/10.1016/S0140-6736(19)30418-0 (2019)

Antiretroviral therapy (ART) is able to prevent transmission of HIV in condomless sex between men who have sex with men.

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MedicalRF/Science Source

There was a lack of evidence of the risk of HIV transmission between men who have sex with men without condoms when the infected partner is taking ART, particularly when compared to the amount of data on heterosexual couples.

The PARTNER2 study followed almost 1,000 couples in 75 cities in 14 European countries over 8 years and found that, despite almost 77,000 condomless sex acts in which the affected partner was on suppressive ART therapy, there were zero phylogenetically linked transmissions between couples.

The study reveals that men on suppressive ART are sexually noninfectious and shows promise for the elimination of HIV.