Additional file 1.
Character optimization of H275Y on a tree based on NA segments from the pandemic H1N1 lineage. This file is in scalable portable document format. The mutation H275Y visualized in color (green = H = susceptible to oseltamivir: red = Y = resistant to oseltamivir) on the best tree.
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Janies et al. International Journal of Health Geographics 2010 9:13 doi:10.1186/1476-072X-9-13