每年预防了数百万的死亡，并减少了因传染病导致残疾的风险。天花已经被消灭，脊髓灰质炎也将在数年内成为历史记录。

Every year, millions of deaths are prevented, and the risk of disability caused by infectious diseases is further reduced.

youdao

每年预防了数百万的死亡，并减少了因传染病导致残疾的风险。天花已经被消灭，脊髓灰质炎也将在数年内成为历史记录。

Every year, millions of deaths are prevented, and the risk of disability caused by infectious diseases is further reduced.

youdao