Figure 1From: Molecular relationship between field and vaccine strain of measles virus and its persistence in PakistanEvolutionary Relationships of Taxa. The percentage of replicate trees in which the associated Taxa clustered together in the bootstrap test (500 replicates) is shown next to the branches [25]. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. Abbreviations used: PAK-Pakistan, CAN-Canada and AFG-Afghanistan.Back to article page