Two consecutive randomized controlled pertussis booster trials in children initially vaccinated in infancy with an acellular vaccine: The first with a five-component Tdap vaccine to 5-year olds and the second with five- or monocomponent Tdap vaccines at a
Keywords: ایمنی زایی; Pertussis; Diphtheria; Tetanus; Vaccine; Acellular; Booster; Preschool; Adolescent; Immunization; Immunogenicity; Adverse effect; Reactogenicity;