Different careers in pediatrics include a pediatric registered nurse or nurse practitioner, pediatric physician, and pediatric specialist, such as a pediatric oncologist. Pediatric nurses may prescribe medicine, perform screenings at schools or in a doctor’s office, and administer immunizations for childhood diseases, such as measles and mumps. Pediatric physicians, or pediatricians, have higher-level responsibilities, such as diagnosing infants and adolescents, discussing treatment options with parents and caregivers, and engaging in professional development work. Pediatric specialists typically focus on a particular subfield of pediatric medicine and work by referral from a pediatrician.