The CDC has always published a weekly report on the state of influenza in the US…this is called the Flu View Synopsis.
Of course now it is ever more interesting as we are now into the first few weeks of the second wave of the H1N1 pandemic…during week 36 (September 6-12, 2009), influenza activity increased in the U.S.
- 99% of 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 below the epidemic threshold.
- Two influenza-associated pediatric deaths were reported, and both were associated with 2009 influenza A (H1N1) virus infection.
- The proportion of outpatient visits for influenza-like illness (ILI) was above the national baseline. Regions 2, 4, 5, 6, 7, 9, and 10 reported ILI above region-specific baseline levels.
- Twenty-one states reported geographically widespread influenza activity, nine states and Puerto Rico reported regional influenza activity, 11 states and the District of Columbia reported local influenza activity, eight states and Guam reported sporadic influenza activity, one state reported no influenza activity, and the U.S. Virgin Islands did not report.
Oh and by the way…The 2009-10 influenza season officially begins October 4, 2009.
Flu View http://www.cdc.gov/flu/weekly/