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FluView : 2012-2013 Influenza Season ; Week 47 ending November 24, 2012
  • Published Date:
    11/29/12
  • Language:
    English
Filetype[PDF-378.49 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 47 (November 18-24, 2012), influenza activity increased in the U.S.

    o Viral Surveillance: Of 5,342 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 47, 812 (15.2%) were positive for influenza.

    o Novel Influenza A Virus: One human infection with a novel influenza A virus was reported.

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

    o Influenza-associated Pediatric Deaths: No influenza-associated pediatric deaths were reported.

    o Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 2.2%, which is at the national baseline of 2.2%. Five regions reported ILI above region-specific baseline levels. Five states experienced high ILI activity, two states experienced moderate ILI activity; 4 states experienced low ILI activity; New York City and 39 states experienced minimal ILI activity, and the District of Columbia had insufficient data.

    o Geographic Spread of Influenza: The geographic spread of influenza in 4 states was reported as widespread; 7 states reported regional activity; 19 states reported local activity; the District of Columbia and 18 states reported sporadic activity; Guam and 1 state reported no influenza activity, and Puerto Rico, the U.S. Virgin Islands and 1 state did not report.

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