Evaluation of the Association of Maternal Pertussis Vaccination With Obstetric Events and Birth Outcomes

Abstract
Bordetella pertussis is a highly contagious human respiratory pathogen. Infants are at highest risk of severe pertussis infections. The tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis vaccine (Tdap) was licensed in 2005 for use in nonpregnant adolescents and adults.1 Initially, postpartum administration of Tdap to parents and other caregivers was encouraged to prevent the transmission of pertussis to newborns.1,2 However, recent outbreaks, including infant deaths,3,4 have led to changing Tdap vaccine recommendations.5