The goal is to end transmission of the wild polio virus.

目标是结束野生脊髓灰质炎病毒的传播。

2018 only two countries Pakistan and Afghanistan reported cases of the wild polio virus.

二零一八年，只有巴基斯坦和阿富汗报告了野生脊髓灰质炎病毒病例。

But now the wild polio virus exists only in Afghanistan and Pakistan.

但是现在小儿麻痹症病毒只存在于阿富汗和巴基斯坦。

Since then nine billion oral polio vaccines have prevented nearly two million cases of wild polio virus on the continent.

自那时以来，90亿口服脊髓灰质炎疫苗预防了非洲大陆近200万例野生脊髓灰质炎病毒病例。