The Saint Louis Zoo is the only zoo that hosts such a One Health Fair. Over the years more institutions have been included and now two veterinary colleges (Univ of Ill and Univ of Missouri), two medical colleges (WashU and St Louis U) and two undergraduate ecology schools (WashU and Fontbonne) participate. The event brings together teams of 3 which include an MD, DVM and ecology/environment student. These teams work together on some One Health topic and learn to speak the same language and really just get to know students in the other arm of OH. After a few weeks of working together, they then have ½ a day on Saturday to present their topic to Zoo visitors (up to 20,000 ).