This article examines recent global HIV/AIDS data, and reasons for the reported reduction in the number of cases. It focuses on the epidemics in Southern Africa, and the Southern Cone of Latin America. Southern Africa has the worst epidemic in the world. Here it is heterosexually driven and more women than men are infected. The southern cone of Latin America (Uruguay, Paraguay, Argentina and Chile) has a stable epidemic, with low prevalence, driven primarily through injecting drug use and men having sex with men. One of the questions that is frequently posed is: why is the epidemic in Southern Africa so bad? There is benefit in comparing these two areas and trying to understand the similarities and differences, in particular why the Latin American epidemic has been controlled. [Article in Spanish with an English summary].
Whiteside, A. Comprender y analizar datos: lecciones de y para el sur de África y Latinoamérica [Understanding and interpreting data: lessons from and for southern Africa and Latin America]. Actualizaciones en SIDA (2008) 16 (60) 75-80.