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FluView : 2017-2018 influenza season week 7 ending February 17, 2018
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Details:
  • Description:
    All data are preliminary and may change as more reports are received.

    During week 7 (February 11-17, 2018), influenza activity remained elevated in the United States.

    • Viral Surveillance: The most frequently identified influenza virus subtype reported by public health laboratories during week 7 was influenza A(H3). The percentage of respiratory specimens testing positive for influenza in clinical laboratories remained elevated.

    • Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was above the system-specific epidemic threshold in the National Center for Health Statistics (NCHS) Mortality Surveillance System.

    • Influenza-associated Pediatric Deaths: Thirteen influenza-associated pediatric deaths were reported.

    • Influenza-associated Hospitalizations: A cumulative rate of 74.5 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported.

    • Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 6.4%, which is above the national baseline of 2.2%. All 10 regions reported ILI at or above region-specific baseline levels. New York City, the District of Columbia, Puerto Rico and 39 states experienced high ILI activity; five states experienced moderate ILI activity; three states experienced low ILI activity; and three states experienced minimal ILI activity.

    • Geographic Spread of Influenza: The geographic spread of influenza in Puerto Rico and 48 states was reported as widespread; the District of Columbia, Guam and two states reported local activity; and the U.S. Virgin Islands reported no activity.

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