title: Immunological principles in relation to immunization programmes.
mesh_terms: D001500:BCG Vaccine; D022121:Cholera Vaccines / Q000008:administration & dosage; D004168:Diphtheria Toxoid / Q000008:administration & dosage; D006801:Humans; D007114:Immunization; D007115:Immunization Schedule; D010567:Pertussis Vaccine / Q000008:administration & dosage; D012900:Smallpox Vaccine / Q000008:administration & dosage; D013745:Tetanus Toxoid / Q000008:administration & dosage; D014436:Typhoid-Paratyphoid Vaccines / Q000008:administration & dosage
chemical_list: D001500:BCG Vaccine; D022121:Cholera Vaccines; D004168:Diphtheria Toxoid; D010567:Pertussis Vaccine; D012900:Smallpox Vaccine; D013745:Tetanus Toxoid; D014436:Typhoid-Paratyphoid Vaccines