Michael Emch, PhD, is Professor and Chair of Geography at the University of North Carolina at Chapel Hill (UNC). He is also Professor of Epidemiology at UNC, a Fellow of the Carolina Population Center, and Director ofthe Spatial Health Research Group. Dr. Emch has published widely in the subfield of disease ecology, primarily on infectious diseases of the tropical world. He is an associate editor of Health & Place and an advisory editor for the international journal Social Science and Medicine.

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Elisabeth Dowling Root, PhD, is Associate Professor of Geography at The Ohio State University. She is also Associate Professor of Epidemiology in the College of Public Health and a research affiliate at the Institute for Population Research. Dr. Root's work evaluates the short- and long-term impacts of public health interventions—including vaccination campaigns, maternal and child health and family planning programs, and health systems changes—in low-income countries. She is also interested in the long-term effects of neighborhood social and structural environments on child and adolescent health.

Margaret Carrel, PhD, is Assistant Professor of Geographical and Sustainability Sciences at the University of Iowa. She is also Assistant Professor of Epidemiology in the College of Public Health. Dr. Carrel focuses primarily on the geography of infectious disease, with emphasis on how human-environment interactions influence the evolution of pathogens. She is also interested in understanding the impact of food production, particularly of livestock, on human health.

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