Potential impact of parental Tdap immunization on infant pertussis hospitalizations

► Young infants have the highest morbidity and mortality from pertussis. ► Parents are a common source of pertussis for young infants. ► Immunizing parents and household contacts with pertussis vaccine is recommended. ► Immunizing parents should reduce infant pertussis hospitalizations by ≥9-14%. ► Parental Tdap immunization may also benefit infants of subsequent pregnancies.