The PARTNER study followed mixed-HIV-status gay and heterosexual couples in which the HIV-positive partner had achieved undetectable status via antiretroviral (ARV) treatment. In July, published study results reported zero HIV transmissions among the 888 couples, who had engaged in 58,000 instances of condomless sex.

The news was huge. It helped convince many, including public health official Demetre Daskalakis, MD, to sign a statement by Bruce Richman’s Prevention Access Campaign proclaiming the “negligible risk” posed by those who have been undetectable on ARVs for six months or longer. (For more info, click here.) On social media, individuals and organizations responded with messages spreading the good news and welcoming the findings as proof that undetectable equals uninfectious.

Here’s a peek at some of the buzz: