title: [Specific prevention of diphtheria in Bulgaria].
mesh_terms: D002031:Bulgaria; D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000453:epidemiology / Q000266:history / Q000276:immunology / Q000401:mortality / Q000517:prevention & control*; D004168:Diphtheria Toxoid; D049672:History, 19th Century; D006801:Humans; D007223:Infant; D012621:Seasons; D012882:Skin Tests; D014611:Vaccination
chemical_list: D004168:Diphtheria Toxoid
vernacular_title: Spetsificheskaia profilaktika difterii v Bolgarii.