2009-2010 Influenza Season Week 43 ending October 31, 20092009-2010 Influenza Season Week 43 ending October 31, 2009 November 8, 2009November 8, 2009 adminadmin 0 Comments 7:48 pm During week 43 (October 25-31, 2009), influenza activity remained elevated in the U.S. ... Read FullRead Full