Why some parents refuse pertussis immunisation.
D001294:Attitude to Health; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D010290:Parents / Q000523:psychology*; D010567:Pertussis Vaccine / Q000009:adverse effects; D014611:Vaccination
D010567:Pertussis Vaccine