Fig. 2

The Bayesian maximum clade credibility (MCC) tree of HIV-1 CRF65_cpx sequences. The MCC tree was constructed using Dataset-1, consisting of 136 sequences, of which 54 were from Hainan Province and 82 were downloaded from the HIV Sequence Database (Table S1). The colors of the rectangles indicate different provinces. The dotted rectangle represents the monophyletic clade, consisting of 53 Hainan sequences (Dataset-2) and one Beijing sequence. The colors of the triangles in the tip represent the risk factors. The values next to the black dots indicate the time of the most recent common ancestor (95%HPD intervals). Scale years are presented at the bottom of the figure. Note. HETs: Heterosexuals. MSM: Men who have sex with men