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Screenshot from Janies et al., (2007) depicting the spread of the genotype Lys-627 in the Polymerase Basic 2 protein of H5N1 in 351 Influenza strains [Janies et al., 2007]. The phylogenetic tree is based on full genome analysis of 351 isolates of H5N1 collected between 1996 and 2006. The genotype increases the ability of the virus to replicate in mammalian hosts. Earth background image sources: Google, TerraMetrics, and NASA.
