Founded in 2008, the TOID Fellowship seeks to expand institutional expertise and train the next generation of providers in clinical and academic activities focused on infectious complications in transplant (solid organ and stem cell) and oncology patients. Since its development, Johns Hopkins has been recognized as a primary training site for TOID, and has hosted numerous visiting clinicians, clinical fellows, medical students, and undergraduates for electives in the subspecialty, from both US and international hospitals.