Carol E. Nicholson, MD, MS, FAAP, is the Project Scientist for the Collaborative Pediatric Critical Care Research Network (CPCCRN) and Program Director for Pediatric Care and Rehabilitation Research (PCCR). Nicholson discusses the results of the CPCCRNs critical pertussis study, which sought to characterize the condition, its change over time and the level of support required for pediatric patients.