Archive of National Statistical Flu Data from CDC

During week 23 (June 7-13, 2009), influenza activity decreased in the United States, however, there were still higher levels of influenza-like illness than is normal for this time of year.

• Two thousand seven hundred sixty-five (38.7%) 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.
• Over 98% of all subtyped influenza A viruses being reported to CDC were pandemic influenza A (H1N1) viruses.
• The proportion of deaths attributed to pneumonia and influenza (P&I) was slightly above the epidemic threshold.
• One influenza-associated pediatric death was reported and was associated with pandemic influenza A (H1N1) virus infection.
• The proportion of outpatient visits for influenza-like illness (ILI) was below the national baseline. One of the 10 surveillance regions reported ILI above their region-specific baseline.
• Eleven states reported geographically widespread influenza activity, six states and Puerto Rico reported regional influenza activity, the District of Columbia and 13 states reported local influenza activity, and 20 states reported sporadic influenza activity.