Polio this week as of 12 November 2014
In Madagascar, a circulating vaccine-derived poliovirus type 1 (cVDPV1) has been confirmed. The virus was isolated from one case of acute flaccid paralysis (AFP) with onset of paralysis on 29 September, and from three healthy contacts. An estimated more than 25% of children remain under-immunized against polio in the country. Madagascar was previously affected by a cVDPV2 outbreak in 2001/2002 (resulting in five cases) and in 2005 (resulting in three cases). Emergency outbreak response is being finalized, with campaigns to be held in December and January.
It has been two years since the last case due to wild poliovirus type 3 (WPV3) was reported. WPV3 was last detected globally on 10 November 2012, in Yobe, Nigeria. In Asia, the last WPV3 was detected in April 2012, in Khyber Agency, Federally Administered Tribal Areas (FATA), Pakistan. All cases due to wild poliovirus in the past two years have been caused by wild poliovirus type 1 (WPV1). Wild poliovirus type 2 (WPV2) has not been detected since 1999.