title: [EVOLUTION OF INFLUENZA VIRUS A2 FROM 1957 TO 1962].
mesh_terms: D006385:Hemagglutination Inhibition Tests; D006801:Humans; D009975:Orthomyxoviridae; D014586:USSR
keywords: HEMAGGLUTINATION INHIBITION TESTS; INFLUENZA VIRUSES; USSR
vernacular_title: EVOLUTION DU VIRUS GRIPPAL A2 DE 1957 'A 1962.