Update: influenza activity--United States, February 26-March 4, 2006.
During February 26-March 4, 2006, the number of states reporting widespread influenza activity increased to 25. Thirteen states reported regional activity, eight reported local activity, and four reported sporadic activity.
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