The Columbia University Mailman School of Public Health's Department of Epidemiology focus is on interdisciplinary research that applies a broad cells-to-society approach to population health questions. The department is organized around its core areas of research: chronic disease epidemiology, infectious disease epidemiology, injury epidemiology, lifecourse epidemiology, psychiatric/neurological epidemiology, and social epidemiology. We are guided by a commitment to the practice of a consequential epidemiology, in which we strive not only to publish our findings but to translate them to the public and use them to guide policy and practice toward improvements in population health. We offer master’s and doctoral degree programs, as well as a summer training institute. Degrees granted by the department include a PhD, DrPH, MPH, MS, and an Executive MS. The department sponsors or co-sponsors many training programs for doctoral and post-doctoral trainees in the areas of cancer, family planning, international AIDS research, HIV-related malignancies in South Africa, infectious disease epidemiology, maximizing diversity, nutrition and population health, neuro-epidemiology, psychiatric epidemiology, public psychiatry, the Robert Wood Johnson Health and Society Scholars Program, substance abuse, and anti-microbial resistance.