Figure 4From: Measles Resurgence Associated with Continued Circulation of Genotype H1 Viruses in China, 2005Phylogenetic tree of measles wild-type virus strains of China in 2005 (triangles) and WHO reference MV strains (dots) based on the 456 nucleotide sequences coding for the COOH-terminus of the nucleoprotein, by using MEGA4 software and the neighbor-joining method (500 bootstraps). Genetic distances are represented as numbers of nucleotide differences between strains.Back to article page