title: Recommended composition of influenza virus vaccines for use in the 1990-1991 season.
mesh_terms: D000328:Adult; D000368:Aged; D000917:Antibody Formation; D001208:Asia; D002648:Child; D004196:Disease Outbreaks; D005060:Europe; D006801:Humans; D009980:Influenza A virus / Q000276:immunology / Q000302:isolation & purification; D009981:Influenza B virus / Q000276:immunology / Q000302:isolation & purification; D007252:Influenza Vaccines / Q000032:analysis / Q000276:immunology / Q000592:standards*; D007251:Influenza, Human / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D009656:North America
chemical_list: D007252:Influenza Vaccines