Phylogenetic analysis of the complete genome and VP1 protein-coding region of the Changchun strains.

<p>Phylogenetic trees were generated by the neighbor-joining method with 1000 bootstraps for 7 representative Changchun strains and other EV71 strains of known subgenotypes. The poliovirus 1 strain was used as the outlier. The ▪ icon indicates the fatal cases; ▴ indicates the severe cases; • indicates the mild cases. A: Phylogenetic tree based on the whole genome sequences. B: Phylogenetic tree based on the VP1 region (891 bp).