Fig. 1

Bayesian phylogenetic tree based on complete genome HBV sequences. The tree root was cut off to ensure the visibility of the modern parts of the tree. Tree nodes with posterior probability > 90% are marked with asterisk. For each sequence, the number in the GenBank database, the HBV genotype, the country, and the year of isolation are indicated. Sequence names from the samples collected for this study are shown in turquoise. For compressed clusters, the number of sequences and regions of isolation are given in parenthesis. The colors of tree branches represent the places of introduction and origin. In each tree node, the 95% HPD is shown as a gray bar. The X axis shows time in years presented descending from the date of collection of the most recent sample