Dr. Sullivan trained at UCSF and Johns Hopkins and has been at the Children’s Hospital of Philadelphia since 1993.  She is the Division Chief of Allergy Immunology, overseeing one of the largest North American clinics for inborn errors of immunity.   She co-edits Stiehm’s textbook on Immune Deficiencies and her clinical interests include the study of patients with DiGeorge syndrome/Chromosome 22q11.2 deletion syndrome, variables related to outcomes of patients with primary immunodeficiencies, and the pathogenesis of early onset inflammatory bowel disease.