Stephen I. Pelton is Professor of Pediatrics at Boston University Schools of Medicine in Massachusetts. He is the former Director of Pediatric Infectious Diseases at Boston Medical Center (BMC) and Coordinator of Maternal Child HIV Program. Professor Pelton received his medical degree from the State University of New York, Buffalo School of Medicine. He completed a residency in pediatrics at BMC and fellowship in pediatric infectious diseases at Harvard Medical School at the Channing Laboratory at Boston City Hospital. He is board certified in Pediatric Infectious Diseases and Pediatrics by the American Board of Pediatrics. Professor Pelton is an active clinician, investigator, a member of the Boston Medical University Campus Institutional Review Board, and mentor for trainees in pediatric infectious diseases at Boston Medical Center. His laboratory is focused on vaccine-preventable diseases, especially those due to Streptococcus pneumonia, and new vaccines for prevention of respiratory tract infection due to nontypeable Haemophilus influenzae. Professor Pelton’s work has led to his recognition as a leading clinical scientist in studies of the impact of pneumococcal conjugate vaccine on invasive and respiratory tract disease in children. Recent studies include studies of immunogenicity and safety of pneumococcal conjugate vaccines in HIV infected children, studies of immunogenicity and safety of a novel pneumococcal conjugate vaccine (adjuvanted with MPL) in infants, as well as studies of the burden of pneumococcal disease in children and adults with comorbid conditions. He has authored more than 150 manuscripts including publications in The New England Journal of Medicine, Clinical Infectious Diseases, The Journal of Pediatrics, Vaccine, and Pediatric Infectious Disease Journal.