Report of the feasibility study of a postal enquiry into the pattern of illnesses before and after immunization of infants.
D006801:Humans; D007117:Immunization, Secondary; D007223:Infant; D009017:Morbidity; D010567:Pertussis Vaccine / Q000008:administration & dosage*; D011795:Surveys and Questionnaires; D014611:Vaccination; D014917:Whooping Cough / Q000453:epidemiology / Q000517:prevention & control
D010567:Pertussis Vaccine