Figure 1.

Time-scaled phylogenetic tree based on ebolavirus sequences from ref. (25) from Kenema Government Hospital, Sierra Leone, May and June 2014 plus early samples from Guinea from ref. (23). Branch colours represent probable location of infection with the corresponding locations shown in the inset map. In the map, the radius of the circles denotes the number of sampled sequences and the lines represent the phylogenetic tree projected onto the map.