title: Epidemiological surveillance programme in diphtheria during the stage of low morbidity.
mesh_terms: D000293:Adolescent; D002648:Child; D003353:Corynebacterium diphtheriae / Q000472:pathogenicity; D004165:Diphtheria / Q000453:epidemiology* / Q000382:microbiology / Q000517:prevention & control; D004166:Diphtheria Antitoxin / Q000097:blood; D004812:Epidemiologic Methods; D006801:Humans; D007109:Immunity; D011159:Population Surveillance; D012572:School Health Services; D014611:Vaccination; D014774:Virulence
chemical_list: D004166:Diphtheria Antitoxin