Article
Continuing progress towards a unified nomenclature for the highly pathogenic H5N1 avian influenza viruses: divergence of clade 2·2 viruses
23 Feb 2009
Abstract excerpt
To the editor: The WHO/OIE/FAO H5N1 Evolution Working Group has previously proposed a nomenclature system designed to classify the A/goose/Guangdong/1/1996 lineage of Eurasian highly pathogenic H5N1 avian influenza viruses. To date the nomenclature system has identified 10 distinct clades of viruses based primarily on the phylogenetic characterization and sequence homology of the hemagglutinin (HA) gene. 1 Clades...
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