由于国家级以下的急性弛缓性麻痹监测质量存有差距，因此尚不能排除存在未经发现的野生脊灰病毒传播情况。
Due to gaps in the quality of acute flaccid paralysis (AFP) surveillance at subnational levels, additional undetected WPV circulation cannot be ruled out.
由于国家级以下的急性弛缓性麻痹监测质量存有差距，因此尚不能排除存在未经发现的野生脊灰病毒传播情况。
Due to gaps in the quality of acute flaccid paralysis (AFP) surveillance at subnational levels, additional undetected WPV circulation cannot be ruled out.
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