UPDATE: Weekly FluView Map and Surveillance Report for Week Ending April 24, 2010

During week 16 (April 18-24, 2010), influenza activity decreased in the U.S.16 (1.2%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division were positive for influenza.