title: Fractional doses of DPT vaccine.
mesh_terms: D002675:Child, Preschool; D003906:Developing Countries; D006801:Humans; D007223:Infant; D010567:Pertussis Vaccine / Q000008:administration & dosage*; D014917:Whooping Cough / Q000276:immunology* / Q000401:mortality
chemical_list: D010567:Pertussis Vaccine