title: [IMMUNO-EPIDEMIOLOGICAL STUDY ON THE NATURAL VARIATION OF TYPE A AND B INFLUENZA VIRUSES DURING THE PAST 30 YEARS IN RUMANIA].
mesh_terms: D016021:Epidemiologic Studies; D004813:Epidemiology; D006801:Humans; D007251:Influenza, Human; D029524:Betainfluenzavirus; D009975:Orthomyxoviridae; D012383:Romania; D012698:Serologic Tests
keywords: EPIDEMIOLOGY; INFLUENZA; RUMANIA; SERODIAGNOSIS
vernacular_title: ETUDE IMMUNO-'EPID'EMIOLOGIQUE SUR LA VARIATION NATURELLE DU VIRUS GRIPPAL DE TYPE A ET B AU COURS DES 30 DERNI'ERES ANN'EES EN ROUMANIE.