Influenza virus characterisation, summary Europe, April 2011
Surveillance report
Influenza A(H1N1)pdm, influenza A(H3N2), influenza B/Victoria/2/87 lineage and B/Yamagata/16/88 lineage viruses have been characterised genetically and antigenically.
Recently isolated H1N1pdm viruses fall into several genetic groups but all groups show antigenic similarity to the currently recommended vaccine virus A/California/7/2009.H3N2 viruses also fall into distinct genetic groups but there is no consistent correlation between any group and antigenic differences from the currently used vaccine virus A/Perth/16/2009.
Influenza B viruses of the B/Victoria/2/87 lineage have continued to predominate over those of the B/Yamagata/2/87 lineage. Most of the B/Victoria/2/87 lineage viruses are genetically and antigenically similar to the currently recommended vaccine virus B/Brisbane/60/2008.
Recently isolated H1N1pdm viruses fall into several genetic groups but all groups show antigenic similarity to the currently recommended vaccine virus A/California/7/2009.H3N2 viruses also fall into distinct genetic groups but there is no consistent correlation between any group and antigenic differences from the currently used vaccine virus A/Perth/16/2009.
Influenza B viruses of the B/Victoria/2/87 lineage have continued to predominate over those of the B/Yamagata/2/87 lineage. Most of the B/Victoria/2/87 lineage viruses are genetically and antigenically similar to the currently recommended vaccine virus B/Brisbane/60/2008.
Publication file
1105_Influenza_virus_characterisation_2011_May.pdf
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