Originally Posted by jimmycooper

The presumption was implicit in the accusatory nature of your response. But whatever.

The study is not finished yet but it started i think in 2010 and there have been no transmissions last i checked. When it started, undetectable was viral load <500ml. Since then, testing has become more sensitive so undetectable = < 20ml. The study continues to be done at <500. Testing is done unprotected. Both gay and straight couples. So unless something drastically changes before the end of the study in 2017, which it wont, i would say 99.99% for unprotected anal if giver is on meds with a vl < 20 and much closer to 100% if protected vaginal.