Letter: Whooping-cough vaccination.
D000367:Age Factors; D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D006801:Humans; D006814:Hungary; D007117:Immunization, Secondary; D007223:Infant; D010567:Pertussis Vaccine / Q000008:administration & dosage*; D012606:Scotland; D014917:Whooping Cough / Q000517:prevention & control*
D010567:Pertussis Vaccine