title: How long can we expect pertussis protection to last after the adolescent booster dose of tetanus-diphtheria-pertussis (Tdap) vaccines?
authors.affiliation: Vaccine Evaluation Centre, BC Children's Hospital, Vancouver, British Columbia.
authors.forename: Nawaf Al
authors.initials: NA
authors.lastname: Dajani
authors.forename: David
authors.initials: D
authors.lastname: Scheifele