title: Update: influenza activity--United States, October 1, 2006-February 3, 2007.
abstract: This report summarizes U.S. influenza activity since the beginning of the 2006-07 influenza season (October 1, 2006) and updates the previous summary. Low levels of influenza activity were reported from October through early December. Activity increased from mid-December through the end of the year, declined slightly in early January, and then increased again in mid-January.
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; D011159:Population Surveillance; D014481:United States / Q000453:epidemiology