脊髓灰质炎；小儿麻痹症一种极具感染性的病毒性疾病，主要影响儿童，而且严重时，可导致。

A highly infectious viral disease that chiefly affects children and, in its acute forms, causes.

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脊髓灰质炎；小儿麻痹症一种极具感染性的病毒性疾病，主要影响儿童，而且严重时，可导致。

A highly infectious viral disease that chiefly affects children and, in its acute forms, causes.

youdao