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Wild poliovirus type 1 (WPV1) genetically linked to virus currently circulating in Pakistan has been isolated in China. 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.

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

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