title: Comparison of 13 acellular pertussis vaccines: adverse reactions.
abstract: OBJECTIVE
  To compare the reactogenicity of a licensed conventional whole-cell (WCL) and 13 acellular pertussis vaccines that differed in the source, manufacture, and quantity of included antigens; all vaccines included diphtheria and tetanus toxoids.
  
  
  METHODS
  Healthy infants were enrolled through six university-based vaccine and treatment evaluation units and were randomized to receive one of the study vaccines at 2, 4, and 6 months of age. Parents recorded the occurrence of fever, redness, swelling, pain, fussiness, drowsiness, anorexia, and use of antipyretics for 2 weeks after each inoculation; nurses interviewed parents on the third day and at each succeeding visit; long-term follow-up information was collected from parents and medical records 1 year after the third immunization.
  
  
  RESULTS
  Of 2200 vaccinated infants, 2189 contributed reaction data after 6375 vaccinations. For every acellular vaccine, every monitored reaction except vomiting occurred at a significantly lower frequency and severity than was seen with WCL. The groups receiving acellular pertussis vaccines differed significantly with respect to redness, swelling, pain, and vomiting, but not with respect to fussiness, antipyretic use, drowsiness, or anorexia.
  
  
  CONCLUSIONS
  Although there were differences among the acellular vaccines, none was consistently the most or least reactogenic; all were associated with substantially fewer and less severe adverse reactions than a standard commercial whole-cell vaccine. Selection of acellular vaccines for further development and for introduction into efficacy trials can give priority to assessments of immunogenicity and purity, with comparative reactogenicity a secondary consideration.
authors.affiliation: Department of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232-2637, USA.
authors.forename: M D
authors.initials: MD
authors.lastname: Decker
authors.forename: K M
authors.initials: KM
authors.lastname: Edwards
authors.forename: M C
authors.initials: MC
authors.lastname: Steinhoff
authors.forename: M B
authors.initials: MB
authors.lastname: Rennels
authors.forename: M E
authors.initials: ME
authors.lastname: Pichichero
authors.forename: J A
authors.initials: JA
authors.lastname: Englund
authors.forename: E L
authors.initials: EL
authors.lastname: Anderson
authors.forename: M A
authors.initials: MA
authors.lastname: Deloria
authors.forename: G F
authors.initials: GF
authors.lastname: Reed
mesh_terms: D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000009:adverse effects; D004311:Double-Blind Method; D005334:Fever / Q000209:etiology; D006801:Humans; D007223:Infant; D010146:Pain / Q000209:etiology; D010567:Pertussis Vaccine / Q000009:adverse effects*; D014839:Vomiting / Q000209:etiology; D014917:Whooping Cough / Q000517:prevention & control
chemical_list: D015721:Diphtheria-Tetanus-Pertussis Vaccine; D010567:Pertussis Vaccine