Figure 3

Phylogenetic trees of representative HRSVB F gene sequences from worldwide samples (a) and Chinese samples (b) from 1962 to 2014. Phylogenetic trees were generated using the neighbor joining method. Chinese sequences are denoted in red. In Panel b, the number within the parentheses behind the name of each representative sequence indicated the total number of sequences identical or similar (nucleotide difference less than 2) to that representative sequence.