The Retrovirus Research Center is a multidisciplinary research center for the study of HIV/AIDS and other Retroviruses. The center promotes the study of HIV infection as a multidisciplinary research arena in which the clinical features, immunological, and virological elements and the psychological and behavioral parameters need to be integrated into a coherent research strategy. The center brings together a coalition of multidisciplinary researchers whose interest is to describe and understand key elements that play a role in the progression and/or expression of HIV infection according to an ecological view of the problem.