Time-scaled Bayesian MCC tree of major Ethiopian HIV-1 subtype C lineages.

<p>MCC tree was obtained after exclusion of putative C/C′ intrasubtype recombinant sequences. Branches are colored according to the initial clade assignment of each sequence based on ML analysis: C_ET (blue) and C′_ET (red). The <i>PP</i> support and the median age (with 95% HPD interval in parentheses) are indicated only at key nodes. Horizontal branch lengths are drawn to scale with the scale at the bottom indicating years. The tree was automatically rooted under the assumption of a relaxed molecular clock.