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Phylogenetic analysis of HA1 region of the HA gene of pandemic 2009A/H1N1 strains isolated from Srinagar, India. The representative strains from 2009/A/California/H1N1 strain and the 2010 vaccine strain A/California/7/2009, India, and from other parts of the world were used to generate the phylogenetic tree using neighbor‐joining method.
