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FluView : 2013-2014 Influenza Season ; Week 1 ending January 4, 2014
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  • Description:
    Synopsis: During week 1 (December 29, 2013-January 4, 2014), influenza activity continued to increase in the United States.

    o Viral Surveillance: Of 9,482 specimens tested and reported by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories during week 1, 2,486 (26.2%) 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-associated Pediatric Deaths: Four influenza-associated pediatric deaths were reported.

    o Influenza-associatedHospitalizations:Acumulativeratefortheseason of 9.7laboratory- 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 4.4%, above the national baseline of 2.0%. All 10 regions reported ILI above region-specific baseline levels. Twenty states experienced high ILI activity; seven states and New York City experienced moderate ILI activity; 11 states experienced low ILI activity; 12 states experienced minimal ILI activity, and the District of Columbia had insufficient data.

    o Geographic Spread of Influenza: The geographic spread of influenzain36stateswas reported as widespread; 11 states and Guam reported regional influenza activity; the District of Columbia, Puerto Rico, and two states reported local influenza activity; and one state reported sporadic influenza activity, and the U.S. Virgin Islands did not report.

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