title: [A comparative study of the epidemic process of influenza in the Soviet Union and the People's Republic of Bulgaria in 1969].
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D002031:Bulgaria; D002642:Chick Embryo; D002648:Child; D002675:Child, Preschool; D046508:Culture Techniques; D004196:Disease Outbreaks; D005455:Fluorescent Antibody Technique; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000382:microbiology; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000276:immunology* / Q000302:isolation & purification; D014586:USSR
chemical_list: D000956:Antigens, Viral
vernacular_title: Sravnitellnoe izuchenie épidemicheskikh protesessov grippa v Sovetskom Soiuze i v Narodnoĭ Respublike Bolgarii v 1969 g.