WHO confirmed that wild poliovirus type 1 (WPV1), genetically linked to virus currently circulating in Pakistan, has been isolated in China. WHO noted that Pakistan is affected by nationwide transmission of WPV1, and is the location of the only wild poliovirus type 3 (WPV3) case in Asia in 2011 (a strain on the verge of elimination on the continent). As at 13 September 2011, Pakistan had reported 84 cases, compared to 48 cases for the same period in 2010. WHO said that in 2011, supplementary immunization activities (SIAs) in Pakistan have been inadequate in quality in key high-risk areas. In security-compromised parts of the Federally Administered Tribal Areas (FATA), and in particular in Khyber agency, upwards of 200,000 children have been regularly missed during SIAs conducted during the last two years. To urgently address the widespread transmission of wild poliovirus affecting the country, the Government of Pakistan has launched a National Polio Emergency Action Plan, with staggered subnational immunization days “followed by further activities in high-risk union councils in 54 districts of the country.”

http://www.who.int/csr/don/2011_09_20/en/index.html