title: Update: Influenza activity--United States, 2002-03 season.
abstract: This report summarizes influenza activity in the United States during September 29, 2002-March 8, 2003, and updates the previous summary. Influenza activity was mild in the United States overall but varied by region. Preliminary data collected through the four components of the CDC influenza surveillance system suggest that national influenza activity peaked during the week ending February 8, 2003.
mesh_terms: D006801:Humans; D009980:Influenza A virus; D009981:Influenza B virus; D007251:Influenza, Human / Q000453:epidemiology*; D011159:Population Surveillance; D012621:Seasons; D014481:United States / Q000453:epidemiology