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FluView : 2015-2016 Influenza Season ; Week 4 ending January 30, 2016
  • Published Date:
    February 5, 2016
  • Language:
    English
Filetype[PDF-1.13 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 4 (January 24-30, 2016), influenza activity increased slightly in the United States.

    • Viral Surveillance: The most frequently identified influenza virus type reported by public health laboratories during week 4 was influenza A, with influenza A (H1N1)pdm09 viruses predominating. The percentage of respiratory specimens testing positive for influenza in clinical laboratories increased.

    • 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: Two influenza-associated pediatric deaths were reported.

    • Influenza-associated Hospitalizations: A cumulative rate for the season of 2.6 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 2.2%, which is above the national baseline of 2.1%. Six of 10 regions reported ILI at or above region-specific baseline levels. Puerto Rico experienced high ILI activity; two states experienced moderate ILI activity; New York City and 11 states experienced low ILI activity; 37 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; Guam and 18 states reported regional activity; the District of Columbia and 16 states reported local activity; the U.S. Virgin Islands and 12 states reported sporadic activity; and one state reported no activity.

    External_F1604.pdf

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