Prof. Alessio Fasano is chief of Pediatric Gastroenterology and Nutrition at MassGeneral Hospital for Children (MGHfC). As Director of the Mucosal Immunology and Biology Research Center (MIBRC) at MGHfC, Prof. Fasano explores the host’s immune system and the role of dysbiosis on the onset and progression of celiac disease and other disorders in order to develop preventive strategies.