2008-2009 Influenza Season Week 23 ending June 13, 2009

All data are preliminary and may change as more reports are received.On June 11, the World Health Organization raised the pandemic alert level from Phase 5 to Phase 6 indicating that an influenza pandemic is underway. The novel influenza A (H1N1) virus now will be referred to as \u201cpandemic H1N1 influenza virus.\u201dSynopsis: 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.External_F0923.pdf2009Human Influenza A (H1N1), 2009648