Dr. Kaplan has been a member of Team Heart since 2009 and is a Professor in the Divisions of Pediatric Infectious Disease and of Pediatric Cardiology. As Head of the World Health Organization Collaborating Center for Reference and Research on Streptococci, Dr. Kaplan is primarily interested in the study of group A streptococcal infections and their sequelae. This streptococcal reference and research laboratory was established by the late Dr. Lewis W. Wannamaker in the early 1950’s and has maintained a productive record of studying the relationship between the human host and the group A streptococcus. This laboratory is one of only five World Health Organization Collaborating Centers for Reference and Research on Streptococci in the world. Currently, the laboratory addresses the epidemiology, microbiology, immunology of group A streptococci, applied research which involves investigations of the clinical and laboratory diagnosis of streptococcal infections, as well studies of the prevention and therapy of group A streptococcal infections and their sequelae.