... were evaluated by opsonophagocytosis assay in a subset of the study population (10). Evaluation of these immunologic parameters indicated that PCV13 induced levels of antibodies that were comparable ... current as of the date of publication. MMWR e MMWR series of publications is published by the Office of Surveillance, Epidemiology, and Laboratory Services, Centers for Disease Control and Prevention ... the National Center for Immunization and Respiratory Diseases, Anne Schuchat, MD, Director.Corresponding preparer: Cynthia G. Whitney, MD, National Center for Immunization and Respiratory Diseases,...