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Wave-Like Spread of Ebola Zaire

Figure 5

Epizootic Pivot Point

Shading of each grid cell indicates the strength of correlation (R2) between geographic distance and patristic genetic distance when that grid cell (rather than Booué) is used as the epizootic pivot point. The position of the best fitting pivot point (shown with a white X) along the Ogooue River (blue line) is consistent with a river crossing near Booué, with subsequent movement east toward the Mendemba area. It is not consistent with gene flow directly between the other mid-1990s outbreak localities (Mekouka and Mayibout) and Mendemba.

Figure 5

doi: https://doi.org/10.1371/journal.pbio.0030371.g005