title: [The level and duration of retention of immunity against diphtheria in children of school age].
mesh_terms: D000293:Adolescent; D000917:Antibody Formation; D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000276:immunology*; D004166:Diphtheria Antitoxin / Q000097:blood; D006386:Hemagglutination Tests; D006801:Humans; D012426:Russia; D012572:School Health Services; D012882:Skin Tests; D013997:Time Factors; D014611:Vaccination
chemical_list: D004166:Diphtheria Antitoxin
vernacular_title: Uroven' i dlitel'nost' sokhraneniia immuniteta protiv difterii u deteĭ shkol'nogo vozrasta.