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Paul A. Offit, MD

Paul A. Offit

Dr. Offit is director of the Vaccine Education Center at CHOP and an internationally recognized expert in the fields of virology and immunology. He is co-inventor of a landmark vaccine achievement for the prevention of rotavirus gastroenteritis.


Paula M. Oliver, PhD

Paula M. Oliver

Dr. Oliver investigates the mechanisms governing T cell activation and protective immunity. Her goal is to define mechanisms that, when dysregulated, result in autoimmunity or allergic disorders like asthma.


Timothy S. Olson, MD, PhD

Timothy S. Olson Headshot

Dr. Olson aims to improve diagnostics and treatment of bone marrow failure (BMF) syndromes, and to improve clinical hematopoietic stem cell transplantation (HSCT) outcomes. He conducts clinical trials of HSCT for non-malignant hematologic diseases. His laboratory explores both basic and translational research focused on genomics of BMF and the impact of BMF on hematopoietic niche function during HSCT.


Kevin C. Osterhoudt, MD, MSCE

Kevin C. Osterhoudt

Dr. Osterhoudt is an attending physician in the Division of Emergency Medicine and the medical director of the Poison Control Center at Children's Hospital of Philadelphia. His interests include the clinical epidemiology and risk assessment of pediatric poisoning exposures, and infantile methemoglobinemia.


Michael L. O'Byrne, MD, MSCE

Michael L. O’Byrne

Dr. O'Byrne is a pediatric cardiologist with research interests in cardiac disease outcomes, perioperative outcomes, and children with pulmonary hypertension. He combines the use of large observational datasets to study outcomes, practice variation, cost, and the determinants of health-related quality of life in this population.