Update: influenza activity--United States, January 15-21, 2006.
During January 15-21, 2006, the number of states reporting widespread influenza activity decreased to five. Twenty-three states reported regional activity, nine reported local activity, and 13 reported sporadic activity.
D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology