Safety of condomless sex

A much anticipated late breaking presentation from London was a study looking at transmission from people with Viral Loads less than 200, who practised condomless sex. No observed transmission occurred, where on accepted transmission data 86 new infections would have been expected in the study group. BUT the science cautioned that they could still be concealing a 32% 10 year transmission risk, if related to receptive anal sex. The caution was a worst case statistic, because of the small numbers so far studied. It seems there will be a lot of explaining to patients to be done in the next few months when the study results get widely published. Researcher's suggestion, tell them "our best guess is its safe, but we can't tell you that", isn't  very useful. Abstract #153LB