*Circulating Vaccine-derived poliovirus (cVDPV) is associated with 2 or more cases of AFP. VDPV type 2 cases with greater than 5nt difference from sabin in VP1 and VDPV type 1 and 3 cases with greater than 9nt difference from sabin in VP1 are reported here. Figures exclude VDPV from non-AFP source. Figures may include different chains of transmission. Nigeria cVDPV count includes 1 case in 2011 with WPV 1 and cVDPV 2 mixture.
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