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. 2012 Feb 24;61(7):123-8.

Update: Influenza activity - United States, October 2, 2011-February 11, 2012

Centers for Disease Control and Prevention (CDC)
  • PMID: 22357404
Free article

Update: Influenza activity - United States, October 2, 2011-February 11, 2012

Centers for Disease Control and Prevention (CDC). MMWR Morb Mortal Wkly Rep. .
Free article

Abstract

This report summarizes U.S. influenza activity* since the beginning of the 2011-12 influenza season (October 2, 2011) and updates the previous report. From October through early January, influenza activity remained low throughout the United States. Activity increased slightly in early February 2012, but remains low. Influenza A (H1N1)pdm09 (pH1N1), influenza A (H3N2), and influenza B viruses all have been identified thus far this influenza season, and the majority of viruses in circulation are antigenically similar to strains included in the 2011-12 vaccine.

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