One of the patients I cared for had a history of congenital diaphragmatic hernia which was repaired right after he was born. He presented to the office one day with a barking cough along with other symptoms, ultimately diagnosed clinically with croup or laryngotracheobronchitis. The father raised the concern that he feels his son is constantly getting sick and wants to know if his history of CDH increased the frequency of contracting respiratory illnesses.