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PostPosted: Fri Dec 28, 2012 2:18 pm 
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CDC week 51 fluView reports 8 fatal adolescent deaths.

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PostPosted: Fri Dec 28, 2012 2:24 pm 
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Eight influenza-associated pediatric deaths were reported to CDC during week 51. Three were associated with influenza B viruses, 3 were associated with influenza A (H3) viruses, and 2 were associated with influenza A viruses for which the subtype was not determined. All 8 deaths occurred during week 50 (week ending December 15, 2012). This brings the total number of influenza-associated pediatric deaths reported during the 2012-2013 season to 16.

http://www.cdc.gov/flu/weekly/

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PostPosted: Fri Dec 28, 2012 2:25 pm 
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PostPosted: Fri Dec 28, 2012 3:42 pm 
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http://www.recombinomics.com/News/12281 ... k51_8.html

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PostPosted: Fri Dec 28, 2012 8:11 pm 
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Flu markers keep climbing in US and Europe
Lisa Schnirring Staff Writer


Dec 28, 2012 (CIDRAP News) – US influenza activity continued its ascent last week, judging from the high volumes of patients seeking care for the disease at doctors' offices, while flu indicators in Europe showed a clear spike, according to the latest surveillance reports.

Outpatient clinic visits for influenza-like illness (ILI) in the United States rose to 4.2% of all visits, well above the national baseline of 2.2%, according to the weekly report from the Centers for Disease Control and Prevention (CDC).

High levels of ILI activity were reported in 16 states and New York City, an increase from 12 states the previous week, the CDC said. The only area that wasn't over its baseline for this flu marker was the western region, which includes Arizona, California, Guam, Hawaii, and Nevada.

The US flu season started early this year, and health officials have said they expect a bad year, because the dominant flu strain is H3N2, which tends to cause more severe illnesses. In some hard-hit areas, such as parts of North Carolina, hospitals are limiting visitors to curb the spread of flu to high-risk patients.

Eight pediatric flu deaths were reported last week, pushing the season's total to 16. Three were linked to influenza B viruses, three were associated with H3N2, and the influenza A subtype wasn't determined for the other two. The percentage of deaths from pneumonia and flu remained below the epidemic threshold, but this indicator usually lags other flu markers.

The percentage of respiratory specimens testing positive for flu stayed high at 29.6%, up from 28.3% reported the week before, according to the CDC.

Labs that monitor the circulating flu strains report that H3N2 is still the dominant strain, followed by influenza B.

Few 2009 H1N1 viruses have been detected in the United States, but the virologic picture in Europe is different, with the virus accounting for close to a third of influenza A viruses that have been subtyped.

Canada, like its southern neighbor, is reporting predominantly H3N2 viruses with few 2009 H1N1 detections, according to the latest report (covering the week ending Dec 15) from the Public Health Agency of Canada (PHAC).

The flu hotspots in Canada so far are four regions of Ontario, which are reporting widespread flu activity. The PHAC said doctor visits for ILI rose from the previous week to a pace expected for this time of year.

In its update today the European Centre for Disease Prevention and Control (ECDC) said that even though surveillance activities have been limited over the holiday period, there are clear indications of rising flu activity, with the disease affecting more countries last week compared with the previous week.

The proportion of specimens that tested positive for flu spiked to 27.3%, compared with 17.3% the week before. Overall, 70% of the samples were influenza A, of which nearly 69% were H3N2. Influenza B made up 28% of the subtyped viruses.

The ECDC said testing suggests that the circulating viruses are well matched to the seasonal flu vaccine. Similar testing by the CDC also showed a close match, except for a few influenza B viruses that were from the Victoria lineage, which is not a component of this season's vaccine for the Northern Hemisphere.

Of 17 European countries that reported clinical data, France and Luxembourg reported medium-intensity flu activity, with the rest reporting low intensity. Three countries reported wide geographic spread: Denmark, the Netherlands, and the United Kingdom (England).

Increasing flu trends were reported by nine countries: the Czech Republic, Denmark, Estonia, France, Hungary, Latvia, Luxembourg, Slovakia , and the UK.

See also:

Dec 28 CDC weekly flu update

Dec 28 ECDC weekly influenza surveillance overview

Dec 21 PHAC weekly flu surveillance report

http://www.cidrap.umn.edu/cidrap/conten ... 12flu.html

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PostPosted: Sat Dec 29, 2012 8:06 am 
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Commentary

http://www.recombinomics.com/News/12291 ... 51_20.html

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PostPosted: Mon Dec 31, 2012 10:17 am 
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Commentary

http://www.recombinomics.com/News/12311 ... T128A.html

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