Vaccines / [edited by] Stanley A. Plotkin, MD, Emeritus Professor of Pediatrics, University of Pennsylvania, Emeritus Professor, Wistar Institute, Former Chief, Division of Infectious Diseases, The Children's Hospital of Pennsylvania, PA, USA, Former Medical and Scientific Director, Pasteur Merieux Connaught (now Sanofi Pasteur), Marnes-la-Coquette, France, Walter A. Orenstein, MD, DSc (Hon), Professor of Medicine, Pediatrics, and Global Health, Emory University, Associate Director Emory Vaccine Center, Atlanta, GA, Former Deputy Director for Immunization Programs, Bill & Melinda Gates Foundation, Seattle, WA, Former Director, National Immunization Program, CDC, Atlanta, GA, USA, Paul A. Offit, MD, Chief, Division of Infectious Diseases, Director, Vaccine Education Center, The Children's Hospital of Philadelphia, Professor of Pediatrics, Maurice R. Hilleman Professor of Vaccinology, Perelman School of Medicine, The University of Pennsylvania, PA USA.