Nutritional Status of Patients With Cystic Fibrosis With Meconium Ileus: A Comparison With Patients Without Meconium Ileus and Diagnosed Early Through Neonatal Screening

Abstract
Objective. Acellular pertussis vaccines were introduced with the promise of an improved safety profile compared with whole-cell vaccines. In 1997–1998, Canada adopted 1 combination acellular pertussis vaccine, having previously used 1 particular combination whole-cell pertussis vaccine. We hypothesized that the change would result in a decrease in hospitalization rates for seizures and reports of hypotonic-hyporesponsive episodes (HHEs) temporally related to pertussis vaccination.