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FluView : 2016-2017 influenza season week 11 ending March 18, 2017

Filetype[PDF-1.52 MB]


  • English
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    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.

      During week 11 (March 12-18, 2017), influenza activity decreased, but remained elevated in the United States.

      • Viral Surveillance: The most frequently identified influenza virus subtype reported by public health laboratories during week 11 was influenza A (H3). The percentage of respiratory specimens testing positive for influenza in clinical laboratories decreased.

      • 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: Two influenza-associated pediatric deaths were reported.

      • Influenza-associated Hospitalizations: A cumulative rate for the season of 50.4 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 3.2%, which is above the national baseline of 2.2%. Seven of ten regions reported ILI at or above their region-specific baseline levels. 12 states experienced high ILI activity; six states experienced moderate ILI activity; nine states experienced low ILI activity; New York City, Puerto Rico, and 23 states experienced minimal ILI activity; and the District of Columbia had insufficient data.

      • Geographic Spread of Influenza: The geographic spread of influenza in 36 states was reported as widespread; Guam, Puerto Rico and 10 states reported regional activity; the District of Columbia and two states reported local activity; two states reported sporadic activity; and the U.S. Virgin Islands reported no activity.

      External_F1711.pdf

    • Subjects:
    • Series:
      FluView : 2016-2017 Influenza Season ; Week 11
    • Document Type:
      Webpage
    • Genre:
      Statistics
    • Place as Subject:
      United States
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