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Bayesian time-scaled tree of Bulgarian Ib HAV sequences (third dataset). The time of the most recent common ancestor, with the credibility interval based on 95% highest posterior density interval (95% HPD), was reported in years. Scaled years are reported at the bottom of the figure. Two clusters (A, B) and one clade (C) are highlighted. HAV = hepatitis A virus, HPD = highest posterior density.
