In addition to international spread of type 1 polio, wild poliovirus type 3 originating from northern Nigeria has also been reported in Chad and Niger.
除了在国际范围蔓延的1型脊髓灰质炎外，乍得和尼日尔也报告了起源于尼日利亚北部的3型脊髓灰质炎病毒。
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).
巴基斯坦全国受到1型野生脊灰病毒传播的影响，并且是2011年在亚洲出现唯一一例3型野生脊灰病毒(在亚洲已濒临消除的一个毒株)病例的地方。
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