Figure 2From: Experimental infection of H5N1 HPAI in BALB/c micePhylogenetic tree based on full length sequencesof HA. Nucleotide sequences were analyzed by using the neighbor-joining method with 500 bootstraps. The phylogenetic tree was rooted to the HA gene of A/goose/Guangdong/1/96 (H5N1) virus.Back to article page