MMWR Morb Mortal Wkly Rep. 2005 Mar 4;54(8):193-6.
Influenza activity has increased steadily in the United States since late December and, as of February 19, might not have peaked. Laboratory-confirmed influenza infections have been reported from all 50 states. This report summarizes influenza activity during October 3, 2004-February 19, 2005.
