TABLE 1

Dispersal statistics for Lassa virus lineages estimated from continuous phylogeographic analysesa

LineageMean branch dispersal velocity (km/yr)Weighted dispersal velocity (km/yr)Mean diffusion coefficient (km2/yr)Weighted diffusion coefficient (km2/yr)
L segment
    Lineage II4.08 [2.36–12.2]1.33 [0.96–1.73]67.7 [42.3–185]49.4 [35.6–74.6]
    Lineage III2.21 [1.18–4.83]0.92 [0.65–1.23]64.6 [30.8–162]38.6 [25.7–53.0]
S segment
    Lineage II9.93 [4.66–39.2]1.47 [1.23–1.73]839.3 [291–4454]85.4 [71.8–100]
    Lineage III3.19 [1.83–11.7]1.04 [0.86–1.25]101.2 [58.1–429]43.4 [35.5–59.1]
  • a The table reports median value and 95% highest posterior density interval for each estimate. Mean branch velocity and diffusion coefficient are estimates over all tree branches. The weighted estimates involve a weighting by branch time.