in São Paulo had a prevalence of Chagas disease of 4.4%, while Chagas disease transmission in São Paulo has been under control since the 1970s. This influx of Chagas disease led to an interdisciplinary team being brought together, This team tested the feasibility of managing Chagas disease and transmission at the primary healthcare level. The interdisciplinary team consisted of community health agents and clerical healthcare workers to recruit Chagas infected persons for the study, physicians, nurses, lab workers, and community agents. A pediatrician and cardiologist were also on call. Each were trained in pathology, parasitology, ecoepidemiology, and how to prevent, diagnose, and control Chagas disease. Training from experts in these respective fields was required. They examined reasons for lack of adherence to treatment, and used this knowledge to improve the effectiveness of their interventions. This interdisciplinary approach has been used to train many teams across Brazil in the management of Chagas disease. Tropical medicine also consists of a preventive approach, especially in an educational aspect. For example, from 2009 to 2011, the London School of Hygiene & Tropical Medicine did an interventional study on a cohort of female sex workers (FSW) in Ouagadougou, Burkina Faso, a country in Western Africa. 321 HIV-unaffected FSWs were provided with peer-led HIV/STI education, HIV/STI testing and care, psychological support, general healthcare, and services for reproductive health. The same cohort would continue to follow up, quarterly, for 21 months. At each follow-up they were tested for HIV and were able to utilize the preventive interventions if need be. Using models based on the same study population had their been no interventions, the expected prevalence of HIV infections was 1.23 infection per 100 person years. In the actual cohort with access to interventions not a single HIV infection was observed in the collective 409 person-years of follow-up. Tropical research in the military Throughout history, American military forces have been affected by many tropical diseases. In World War II alone, it was estimated almost one million soldiers had been infected by a tropical disease while serving. Most affected soldiers served in the Pacific, especially in the Philippines and New Guinea. Malaria was especially widespread in the Pacific, though soldiers in Southern Europe and Northern Africa also contracted tropical diseases. Many diseases now known as neglected tropical diseases affected America soldiers as well. These included helminthiasis, schistosomiasis, dengue, and lymphatic filariasis. Lymphatic filariasis was such a problem it