dr. grant koufax.also are really a ground-breaking research organization as well as providing prevention services and leading the presense efforts in the city. they have really spearheaded this effort at looking at how treatment can effect prevention, how if you get people tested and treated more globally, you can really drive down h.i.v. infection. and so through that, they have pioneered on viral load and h.i.v. testing, in treatment of substance use and a variety of other topics. and then i head the h.i.v. research section and we have a number of talented folks who work with me. we're test age number of different kind of prevention interventions including h.i.v. vaccines, preexposure prophylaxis which is using h.i.v. medication to prevent new infections, reaching out to the african-american community to understand what is driving the epidemic particularly in that community and using peer health navigation to connect them with services, combination prevention intersenses and so forth. in the last yea