Respiratory syncytial virus morbidity, premorbid factors, seasonality, and implications for prophylaxis.

Objectives: We investigated factors associated with morbidity and pediatric intensive care unit (PICU) admission in children with respiratory syncytial virus (RSV) infection and explored seasonality and implication of prophylaxis.

Methods: A retrospective study between 2006 and 2008 of every child with a laboratory-confirmed RSV infection was included.

Results: Six hundred seventy RSV admissions were identified.