These are a few of the many key organizations involved in the fight against HIV/AIDS. The fight against AIDS is a collaborative endeavor that requires not only basic research in cytometry, but an array of other critical disciplines. Equally important are the efforts of entities involved in applied research, education, health communication, health policy, health care delivery, technical support, capacity building, program funding, poverty reduction, and many other areas. Please visit the websites of these organizations to learn about the work of each in the fight against HIV/AIDS.