(UroToday.com) High dose chemotherapy/autologous stem cell transplantation represents a curative salvage treatment for patients with germ cell tumors but is rarely used for other solid tumors. Patients undergoing high dose chemotherapy/autologous stem cell transplantation for hematologic neoplasms require revaccination for their childhood immunizations. Whether this is necessary for patients with germ cell tumor patients is unknown. At the 2021 ASCO annual meeting, Dr. Darren Feldman and colleagues presented the results of their study assessing immunity to childhood vaccines following high dose chemotherapy and autologous stem cell transplantation for germ cell tumors with comparison to Hodgkin lymphoma.