Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12879-022-07528-7/MediaObjects/12879_2022_7528_Fig1_HTML.png)
Neighbor-joining phylogenetic tree based on ~ 380 bp nucleotide sequence (~ 270 to 670 bp of the complete reference genome) of the S region of HBV isolates from the serum samples of patients with type 2 diabetes mellitus (green squares) (MF419214–MF419229) and non-diabetic controls (blue triangles) (NDC1–NDC3). Bootstrap resampling strategy and reconstruction were carried out 1000 times to confirm the reliability of the phylogenetic tree