Re: Week 40 fluview.
2009-2010 Influenza Season Week 40 ending October 10, 2009
All data are preliminary and may change as more reports are received.
Synopsis:
During week 40 (October 4-10, 2009), influenza activity increased in the U.S.
?4,093 (29.4%) 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.
?All subtyped influenza A viruses being reported to CDC were 2009 influenza A (H1N1) viruses.
?The proportion of deaths attributed to pneumonia and influenza (P&I) was above the epidemic threshold.
?Eleven influenza-associated pediatric deaths were reported. Ten of these deaths were associated with 2009 influenza A (H1N1) virus infection and one was associated with an influenza A virus, for which subtype is undetermined.
?The proportion of outpatient visits for influenza-like illness (ILI) was above the national baseline. All 10 regions reported ILI above region-specific baseline levels.
?Forty-one states reported geographically widespread influenza activity, Guam and eight states reported regional influenza activity, one state, the District of Columbia, and Puerto Rico reported local influenza activity, and the U.S. Virgin Islands did not report.
