Dr. Saad B. Omer is the William H. Foege Professor of Global Health and Professor of Epidemiology & Pediatrics at Emory University, Schools of Public Health and Medicine. He is also a faculty member at the Emory Vaccine Center. Dr. Omer has conducted multiple studies - including vaccine trials - in Guatemala, Uganda, Ethiopia, India, Pakistan, Kenya, Bangladesh, South Africa, and the United States. His research portfolio includes clinical and field trials to estimate efficacy and/or immunogenicity of influenza, polio, measles and pneumococcal vaccines; studies on the impact of spatial clustering of vaccine refusers; and clinical trials to evaluate drug regimens to reduce mother-to-child transmission of HIV in Africa. He has conducted several studies to evaluate the roles of schools, parents, health care providers, and state-level legislation in relation to immunization coverage and disease incidence.