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FluView: 2011–2012 Influenza Season Week 48 ending December 3, 2011
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December 9, 2011
[PDF-461.06 KB]
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Journal Article:FluView
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Description:All data are preliminary and may change as more reports are received.
Synopsis: During week 48 (November 27-December 3, 2011), influenza activity remained low in the United States.
• U.S. Virologic Surveillance: Of the 2,233 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, 37 (1.7%) were positive for influenza.
• Novel influenza A Virus: Two human infections with a novel influenza A virus were
• identified.
• Pneumonia and Influenza (P&I) Mortality Surveillance: The proportion of deaths
• attributed to P&I was below the epidemic threshold.
• Influenza-associated Pediatric Mortality: Two influenza-associated pediatric deaths were reported. These deaths occurred during the 2010-11 influenza season.
• Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.2%, which is below the national baseline of 2.4%. All 10 regions reported ILI below region-specific baseline levels. Two states and New York City experienced low ILI activity, forty-eight states experienced minimal ILI activity, and the District of Columbia had insufficient data.
• Geographic Spread of Influenza: The geographic spread of influenza in one state was reported as local; the District of Columbia, Guam, Puerto Rico, and 30 states reported sporadic activity, and the U.S. Virgin Islands and 19 states reported no influenza activity.
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