Figure 7From: Spatial, temporal and genetic dynamics of highly pathogenic avian influenza A (H5N1) virus in ChinaDetection of positively-selected sites. (a) Positively Selected Sites. dN/dS ratio compared with Re-1 vaccine. (b) dN/dS compared with Re-4 vaccine. Black lines are the mean dN/dS values of virus strains after vaccination was implemented, compared with the corresponding vaccine antigen. Mean dN/dS values of virus before vaccination was implemented are shown by green dashed lines.Back to article page