Epidemiology is the study of health and disease in human populations. We gather insight on HIV by identifying and assessing risk factors associated with HIV acquisition and transmission, and the development and progression of the disease in men, women, young people, and the elderly. Epidemiology is a cornerstone of public health, and informs policy and medical efforts to prevent and control HIV.

This HIV Policy Resource Bank category features resources concerning epidemiological research on the prevalence and incidence of HIV; risk factors associated with HIV infection; and the clinical course of HIV and the effect of treatment on health outcomes.