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FluView : 2011-2012 Influenza Season ; Week 46 ending November 19, 2011
  • Published Date:
    November 28, 2011
  • Language:
    English
Filetype[PDF-457.69 KB]


Details:
  • Corporate Authors:
    National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.
  • Description:
    All data are preliminary and may change as more reports are received.

    Synopsis: During week 46 (November 13-19, 2011), influenza activity remained low in the United States.

    • U.S. Virologic Surveillance: Of the 2,276 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, 22 (1.0%) were positive for influenza.

    • Novel influenza A Virus: Three human infections with novel influenza A virus were reported.

    • Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.

    • Influenza-associated Pediatric Mortality: Two influenza-associated pediatric deaths were reported. These deaths occurred during the 2010-11 influenza season.

    • Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.3%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Forty-eight states and New York City experienced minimal ILI activity, two states experienced low ILI activity, and the District of Columbia had insufficient data.

    • Geographic Spread of Influenza: The geographic spread of influenza in the District of Columbia, Guam, Puerto Rico, and 26 states was reported as sporadic and the U.S. Virgin Islands and 24 states reported no influenza activity.

    External_F1146.pdf

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