Ann & Robert H. Lurie Children's Hospital of Chicago Jul 2 2025 The three most common reasons schools called emergency medical services (EMS) were for neurological crises such as seizures, psychiatric conditions or substance abuse, and trauma related injuries, according to data from the national EMS registry analyzed by researchers from Ann & Robert H. Lurie Children's Hospital of Chicago. During the study period (2018-2022), school-based medical emergencies constituted 11 percent of EMS