Welcome to CDC Stacks | FluView : 2011-2012 Influenza Season ; Week 16 ending April 21, 2012 - 32301 | Stephen B. Thacker CDC Library collection
Stacks Logo
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.
 
 
Help
Clear All Simple Search
Advanced Search
FluView : 2011-2012 Influenza Season ; Week 16 ending April 21, 2012
  • Published Date:
    April 27, 2012.
  • Language:
    English
Filetype[PDF - 586.25 KB]


Details:
  • Corporate Authors:
    National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.
  • Series:
    FluView : 2011-2012 Influenza Season ; Week 16 ending April 21, 2012
  • Document Type:
  • Description:
    All data are preliminary and may change as more reports are received.

    Synopsis: During week 16 (April 15-21, 2012), influenza activity was elevated in some areas of the United States, but declined nationally and in most regions.

    o U.S. Virologic Surveillance: Of the 2,987 specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories and reported to CDC/Influenza Division, 662 (22.2%) were positive for influenza.

    o Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths attributed to P&I was below the epidemic threshold.

    o Influenza-associated Pediatric Mortality: Three influenza-associated pediatric deathswere reported. One was associated with a 2009 H1N1 virus, one was associated with a seasonal influenza A (H3) virus, and one was associated with an influenza A virus for which the subtype was not determined.

    o Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.3%, which is below the national baseline of 2.4%. Region 10 reported ILI above its region-specific baseline level. Four states experienced low ILI activity; New York City and 46 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.

    o Geographic Spread of Influenza: Four states reported widespread geographic activity; 10 states reported regional influenza activity; 14 states reported local activity; the District of Columbia and 21 states reported sporadic activity; Guam, the U.S. Virgin Islands, and one state reported no influenza activity, and Puerto Rico did not report.

  • Supporting Files:
    No Additional Files