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FluView : 2011-2012 Influenza Season ; Week 14 ending April 7, 2012
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4/13/12
[PDF-552.66 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 14 (April 1-7, 2012), influenza activity was elevated in some areas of the United States, but declined nationally and in most regions.
• U.S. Virologic Surveillance: Of the 3,607 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, 756 (21.0%) were positive for influenza.
• Novel Influenza A Virus: One human infection with a novel influenza A virus was 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: No influenza-associated pediatric deaths were reported.
• Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 1.5%, which is below the national baseline of 2.4%. Region 10 reported ILI above its region-specific baseline level. One state experienced moderate ILI activity, 1 state experienced low ILI activity; New York City and 48 states experienced minimal ILI activity, and the District of Columbia had insufficient data to calculate ILI activity.
• Geographic Spread of Influenza: Ten states reported widespread geographic activity; 9 states reported regional influenza activity; 20 states reported local activity; the District of Columbia, Puerto Rico, and 11 states reported sporadic activity, and Guam and the U.S. Virgin Islands reported no influenza activity.
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