Letter: Whooping-cough vaccination.
D002675:Child, Preschool; D004739:England; D005069:Evaluation Studies as Topic; D006801:Humans; D007223:Infant; D010567:Pertussis Vaccine / Q000008:administration & dosage*; D014852:Wales; D014917:Whooping Cough / Q000453:epidemiology / Q000517:prevention & control*
D010567:Pertussis Vaccine