dr. seussan sheer and willie mcfarland. they really are the premiere surveillance group for h.i.v. and aids in the country that train many other groups globally about how to track h.i.v. infections and h.i.v.-related disease, so that we can know how best to target our prevention efforts and our treatment efforts. so they have really done a huge service to the global h.i.v. aids community and also in addressing health disparities. the h.i.v. prevention unit is headed by dr. grant koufax. they 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 diff