Dr. Werbel is a physician-scientist who provides consultative care for patients at Johns Hopkins who experience infectious disease complications before and after organ transplant, as well as in the setting of solid tumors or blood cancers. His research with the Johns Hopkins Transplant Research Center uses a combination of epidemiological and laboratory methods to better personalize the prevention of infectious complications among patients with complex immunodeficiencies. This includes using national cohort studies and clinical trials to optimize the use of vaccines and other prophylactic therapies for high-risk immunosuppressed populations.