Clayton O. Onyango*, Antoinette A. Grobbelaar†, Georgina V.F. Gibson†, Rosemary C. Sang*, Abdourahmane Sow‡, Robert Swanepoel†, and Felicity J. Burt†
Figure. Phylogenetic tree showing the relationship between yellow fever virus circulating during the outbreak in southern Sudan in 2003 and other isolates from previous outbreaks in Africa, determined by using a 572-bp region of the genome, a weighted parsimony method and Phylogenetic Analysis Using Parsimony (PAUP) software. Node values indicate bootstrap confidence values generated from 100 replicates (heuristic search).