Leads from the MMWR. Influenza vaccine composition recommendation for the 1989-90 season.
D001208:Asia; D006801:Humans; D009980:Influenza A virus / Q000276:immunology / Q000302:isolation & purification; D009981:Influenza B virus / Q000276:immunology / Q000302:isolation & purification; D007252:Influenza Vaccines / Q000276:immunology*; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology; D014481:United States
D007252:Influenza Vaccines