Figure 2. Potential origin of different genome regions of Slovakian VDPV.

Simplot (Panel A) [20] and bootscanning (Panel B) [21] analyses of genetic relationship of the index strain of the Slovakian type 2 VDPV episode (strain #783) to the attenuated poliovirus (PV) Sabin strains of all three serotypes. A sliding window of 200 nucleotides with 20 nt step was used. Colour codes: PV1, blue; PV2, red; PV3, black.