Outbreaks of vaccine-derived poliovirus are concerning in the last push towards the eradication of the virus. Sharmila Devi reports.

中文翻译：

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在消灭小儿麻痹症的斗争中遭受挫折

疫苗根源性脊髓灰质炎病毒的爆发与消灭该病毒的最后推动有关。沙米拉·德维（Sharmila Devi）报告。