Purpose H5 influenza virus remains a potential threaten to human health.Analysis of the accumulated strain data provides a new way to understand its evolution tendency.With the help of latest developed bioinformatics tools,all available Influenza H5A1 strains were explored to deeply understand their evolution tendency. Methods All H5A1 sequence in NCBI genbank and influenza sequence database were downloaded and aligned,then fast maximizing likelihood method was applied to construct phylogenetic tree,and SRD...

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