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FluView : 2013-2014 Influenza Season ; Week 49 ending December 7, 2013
  • Published Date:
    December 13, 2013
  • Language:
    English
Filetype[PDF - 1.18 MB]


Details:
  • Corporate Authors:
    National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.
  • Description:
    Synopsis: During week 49 (December 1-7, 2013), influenza activity continued to increase in the United States.

    o Viral Surveillance:Of6,219specimenstestedandreported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 49, 830 (13.3%) were positive for influenza.

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

    o Influenza-associatedPediatricDeaths:Noinfluenza-associatedpediatricdeathswere reported.

    o Influenza-associated Hospitalizations: A cumulative rate for the season of 2.0 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported.

    o Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 2.1%, above the national baseline of 2.0%. Three regions reported ILI above region-specific baseline levels. Four states experienced high ILI activity, five states and New York City experienced low ILI activity, 41 states experienced minimal ILI activity and the District of Columbia had insufficient data.

    o Geographic Spread of Influenza: The geographic spread of influenzain14stateswas reported as regional; 18 states reported local influenza activity; the District of Columbia, Guam, Puerto Rico, and 16 states reported sporadic influenza activity; the U.S. Virgin Islands and two states reported no influenza activity.

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