A 2-week-old girl born at 39 weeks’ gestation is evaluated by the pediatrician for cardiopulmonary findings. There is a to-and-fro murmur auscultated diffusely over the sternum. Her vitals are normal. She is not cyanotic. Which of the following is most likely to have prevented these findings?
Maternal immunoglobulin therapy
Maternal vaccination
Neonatal anti-microbial therapy
Neonatal immunoglobulin therapy
Neonatal vaccination
Pre-conception vaccination
