1. Circulating Vaccine-derived Poliovirus*, last 6 months
Rolling 6 months
16 Sep 2010 – 15 Mar 2011
16 cVDPV cases
cVDPV1 (0 case)
cVDPV2 (15 cases)
cVDPV3 (1 case)
cVDPV monthly distribution of cases by country (rolling six months)
cVDPV3
cVDPV2
*Circulating Vaccine-derived poliovirus (cVDPV) is associated with 2 or more cases of AFP. Cases with less than 10 nt genetically related to these outbreaks and cases of ambiguous Vaccine-derived Poliovirus (aVDPV) are not included. Figures exclude VDPV from non-AFP source. Figures may include different chains of transmission.
Data in WHO/HQ as of 15 Mar 2011