title: Update: influenza activity--United States, 1992-93 season.
abstract: From September 27, 1992, through February 13, 1993, the World Health Organization collaborating laboratories in the United States reported 1042 influenza virus isolates. For the weeks ending December 5, 1992, through February 6, 1993, the ratio of specimens positive for influenza virus to total specimens submitted for respiratory virus testing increased from 0.02 to 0.2.
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D009980:Influenza A virus; D009981:Influenza B virus; D007251:Influenza, Human / Q000453:epidemiology* / Q000382:microbiology; D012621:Seasons; D014481:United States / Q000453:epidemiology