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FluView : 2014-2015 Influenza Season ; Week 9 ending March 7, 2015
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  • Description:
    Synopsis: During week 9 (March 1-7, 2015), influenza activity continued to decrease, but remained elevated in the United States.

    o ViralSurveillance:Of14,634specimenstestedandreportedbyU.S.WorldHealth Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 9, 1,670 (11.4%) were positive for influenza.

    o PneumoniaandInfluenzaMortality:Theproportionofdeathsattributedtopneumoniaand influenza (P&I) was above the epidemic threshold.

    o Influenza-associatedPediatricDeaths:Seveninfluenza-associatedpediatricdeathswere reported.

    o Influenza-associatedHospitalizations:Acumulativeratefortheseasonof55.7 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported.

    o OutpatientIllnessSurveillance:Theproportionofoutpatientvisitsforinfluenza-likeillness (ILI) was 2.4%, above the national baseline of 2.0%. Eight regions reported ILI at or above region-specific baseline levels. Puerto Rico and six states experienced high ILI activity; one state experienced moderate ILI activity; 13 states experienced low ILI activity; New York City and 30 states experienced minimal ILI activity; and the District of Columbia had insufficient data.

    o Geographic Spread of Influenza: The geographic spread of influenza in nine states was reported as widespread; Guam, Puerto Rico, the U.S. Virgin Islands, and 29 states reported regional activity; 11 states reported local activity; and the District of Columbia and one state reported sporadic activity.

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