title: Update: influenza activity--United States, 1996-97 season.
abstract: Influenza activity in the United States has continued to decline since mid-January 1997. The predominant viruses have been influenza type A (H3N2), although the proportion of influenza B isolates has increased since the week ending January 18. This report summarizes influenza activity in the United States from September 29, 1996, through the week ending February 15, 1997.
mesh_terms: D006801:Humans; D009980:Influenza A virus; D009981:Influenza B virus; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D012621:Seasons; D014481:United States / Q000453:epidemiology
chemical_list: D007252:Influenza Vaccines