He was one of the first physicians to attain formal “Med-Peds” training, completing a Pediatric

residency at Cornell after an Internal Medicine internship at Johns Hopkins. Karzon’s basic research career began with a fellowship to study Newcastle disease virus, and continued during his first faculty appointment at the University of New York in Buffalo (1952–1968), where he began scientific investigations into polio, measles, canine distemper, rhinderpest, mumps, rubella, echovirus, and influenza. Going back to his childhood, he also discovered and conducted studies on viruses from amphibians and reptiles. In 1968 Karzon accepted an appointment as Chairman of Pediatrics at Vanderbilt University School of Medicine. There he continued to promote work on infectious diseases, and through skilful recruitment and development of local talent helped build Hydroxychloroquine in vivo a strong SAHA HDAC order program devoted to the study of basic microbial pathogenesis and clinical research focused on vaccine evaluation. Later in his career as he stepped away from the administrative duties of Chairman (1986), he focused his accumulated wisdom on HIV vaccine development efforts and on basic studies of respiratory syncytial virus, which have been the areas of major focus in our own scientific careers. He was an important figure in guiding many young investigators as they established careers in academic medicine

and developed strategies for asking research questions. Critical thinking was serious business for Karzon, and he was prepared with a full cup of sharpened #2 pencils to extensively

comment and query the documents presented to him by his protégés. Throughout his professional life, Karzon remained profoundly influenced by the children with polio whom he had encountered at the Sydenham Hospital. They not only shaped his research interests, but also motivated his advocacy for children in his academic and administrative work, his community activities, and his consultative efforts involving vaccine policy and regulation. Following the DNA ligase success of the polio vaccine campaign in the 1950s and early 1960s, he carried that momentum and energy into building a medical infrastructure to provide care to all children. When he arrived in Nashville, the community considered the Junior League Home for Crippled Children as the primary site for compassionate caring of sick children. The Junior League of Nashville had originally built the Home for Crippled Children in the early 1900s to focus on the convalescent care of indigent victims of polio. As polio receded in the 1950s, the Junior League Home for Crippled Children merged with the Nashville Chapter of the National Council for Jewish Women’s Convalescent Home for children with noninfectious diseases, and with the support of the Al Menah Shriners and both private and academic physicians, the Home for Crippled Children began to address the broader spectrum of health care needs specific to children.