The strategy of immunization.
D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D007109:Immunity; D007114:Immunization / Q000191:economics / Q000379:methods*; D007115:Immunization Schedule; D007223:Infant; D011247:Pregnancy; D014611:Vaccination / Q000191:economics / Q000379:methods*; D014612:Vaccines / Q000008:administration & dosage*
D014612:Vaccines