Thank you for the question.
Basically, treatment as prevention is actually an old concept, which is secondary prevention. It's early identification and treatment to minimize the impact of any disease, whether it's through screening, and then early treatment, or, in this case, with HIV/AIDS, the recognition....
It's come clearer in the last while, with Julio's and others' work in Vancouver, that this is an effective way of doing it, but it's one of a series of measures. It's not a substitute for not getting infected in the first place. Clearly, identifying, and people being able to come forward to get diagnosed, to get appropriate treatment, is one part of that. Even in some parts of the world, circumcision is a primary prevention. The development of a vaccine ultimately will be the ultimate in dealing with it.
It really requires a focus on primary prevention—in other words, not getting infected in the first place—early diagnosis and treatment for those who are infected, and appropriate care for what's becoming a chronic disease.