Editor's Note: Children's Hospital of Philadelphia physician and Vaccine Education Center Director Paul Offit, MD, is co-creator of the rotavirus vaccine, Rotateq® and an advocate for vaccine safety, childhood immunization, and stricter vaccine waiver requirements. He also is the Maurice R. Hilleman Professor of Vaccinology and professor of Pediatrics, Perelman School of Medicine at the University
Medical students have a classic rule of thumb on the subject of choosing their specialty: If you're undecided between obstetrics and pediatrics, the moment of truth will happen right after you deliver a baby for the first time.
