Alfredo Morabia, MD (NEW YORK, NY), is the editor-in-chief of the American Journal of Public Health, a professor of epidemiology at the Barry Commoner Center for Health and the Environment at Queens College, City University of New York, and a professor of clinical epidemiology at the Mailman School of Public Health at Columbia University. He is the author of Enigmas of Health and Disease: How Epidemiology Helps Unravel Scientific Mysteries and the editor of A History of Epidemiologic Methods and Concepts.