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FluView : 2015-2016 Influenza Season ; Week 18 ending May 7, 2016
  • Published Date:
    May 13, 2016
  • Language:
    English
Filetype[PDF - 1.71 MB]


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 18 (May 1-7, 2016), influenza activity decreased in the United States.

    • Viral Surveillance: The most frequently identified influenza virus type reported by public health laboratories during week 18 was influenza B. The percentage of respiratory specimens testing positive for influenza in clinical laboratories decreased.

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

    • Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was below their system-specific epidemic threshold in both the NCHS Mortality Surveillance System and the 122 Cities Mortality Reporting System.

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

    • Influenza-associated Hospitalizations: A cumulative rate for the season of 31.0 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 1.8%, which is below the national baseline of 2.1%. Three of 10 regions reported ILI at or above region-specific baseline levels. One state experienced high ILI activity; Puerto Rico experienced moderate ILI activity; two states experienced low ILI activity; New York City and 47 states experienced minimal ILI activity; and the District of Columbia had insufficient data.

    • Geographic Spread of Influenza: The geographic spread of influenza in Puerto Rico and three states was reported as widespread; 12 states reported regional activity; the District of Columbia, Guam, and 20 states reported local activity; and the U.S. Virgin Islands and 15 states reported sporadic activity.

    External_F1618.pdf

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