Walter A Orenstein, MD, DSc (Hon) is Professor Emeritus of Medicine, Pediatrics, Epidemiology, and Global Health at Emory University.  He is also the Director of OrensteinVax, LLC, a consulting firm.  Dr. Orenstein worked at the Centers for Disease Control and Prevention (CDC) for 26 years and was the Director of the United States Immunization Program for 16 years (1988-2004).  He has co-edited the standard textbook in Vaccinology, Plotkin’s Vaccines for the last 6 editions.  His work has focused on developing and implementing vaccination policies especially with regard to polio eradication and measles elimination.