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FluView : 2012-2013 Influenza Season ; Week 4 ending January 26, 2013
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2/1/13
[PDF-971.26 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 4 (January 20-26), influenza activity remained elevated in the United States, but decreased in some areas.
o Viral Surveillance: Of 10,581 specimens tested and reported by collaborating laboratories, 2,701 (25.5%) were positive for influenza.
o Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was above the epidemic threshold.
o Influenza-Associated Pediatric Deaths: Eight pediatric deaths were reported.
o Influenza-Associated Hospitalizations: A cumulative rate for the season of 25.9 laboratory-confirmed influenza-associated hospitalizations per 100,000 population was reported. Of all hospitalizations, more than 50% were among adults 65 years and older.
o Outpatient Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) was 4.2%; this is above the national baseline of 2.2%. All 10 regions reported ILI above region-specific baseline levels. Twenty-four states and New York City experienced high ILI activity; the District of Columbia and 13 states experienced moderate activity; 4 states experienced low activity; and 9 states experienced minimal activity.
o Geographic Spread of Influenza: Forty-two states reported widespread geographic influenza activity; 7 states reported regional activity; the District of Columbia and one state reported local activity; Guam reported sporadic influenza activity, and Puerto Rico and the U.S. Virgin Islands did not report.
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