Polio Update
Wild poliovirus type 1 and Circulating vaccine-derived poliovirus cases
Total Cases Year to date 2016 Year to date 2015 Total in 2015
WPV CVDP WPV CVDP WPV CVDP
Globally 23 3 37 14 74 32
endemic countries 19 0 37 3 74 3
non-endemic countrries 2 3 0 9 0 29
Polio remains endemic in two countries – Afghanistan and Pakistan. . In addition, in August 2016 WPV1 was detected in Nigeria. Nigeria was taken off the list of polio endemic countries in September 2015 because a year had passed with no reported cases of WPV1. WHO, with authorities across the region, is undertaking a thorough field investigation in order to inform a decision on Nigeria’s endemic status. Until poliovirus transmission is interrupted in these countries, all countries remain at risk of importation of polio, especially vulnerable countries with weak public health and immunization services and travel or trade links to endemic countries. Circulating vaccine-derived poliovirus is causing an outbreak in Madagascar, Guinea and Ukraine.