title: Update: influenza activity--United States, March 19-25, 2006.
abstract: During March 19-25, 2006, the number of states reporting widespread influenza activity decreased to 16. Sixteen states reported regional activity, 13 reported local activity, and five reported sporadic activity.
mesh_terms: D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D014481:United States / Q000453:epidemiology