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30% of H3N2 Isolates In US Are Low Reactors
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Author:  niman [ Fri Oct 31, 2014 11:51 am ]
Post subject:  30% of H3N2 Isolates In US Are Low Reactors

CDC released initial data on antigenic characterization of flu in the week 43 FluView which indicated 3 of 10 H3N2 isolates were low reactors.


Author:  niman [ Fri Oct 31, 2014 11:56 am ]
Post subject:  Re: 30% of H3N2 Isolates In US Are Low Reactors

Influenza A (H3N2) [10]:

Seven (70%) of the 10 influenza A (H3N2) viruses tested have been characterized as A/Texas/50/2012-like, the influenza A (H3N2) component of the 2014-2015 Northern Hemisphere influenza vaccine. Three (30%) viruses showed reduced titers with antiserum raised against A/Texas/50/2012 but were antigenically similar to A/Switzerland/9715293/2013, the H3N2 virus selected for the 2015 Southern Hemisphere influenza vaccine. A/Switzerland/9715293/2013 is related to, but antigenically and genetically distinguishable from the A/Texas/50/2012 vaccine virus. A/Switzerland-like H3N2 viruses were first detected in the United States in small numbers in March of 2014 and began to circulate in greater numbers over the spring and summer.

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