title: From the Centers for Disease Control and Prevention. Update: influenza activity--United States and Europe, 1993-94 season.
mesh_terms: D005060:Europe / Q000453:epidemiology; D006801:Humans; D009980:Influenza A virus; D007251:Influenza, Human / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology