• The success in Niger and Egypt is the result of intense efforts in 2004-05 to halt Africa’s polio epidemic and fast-track the introduction of monovalent polio vaccines into selected areas.

    尼日尔埃及成功2004-05强化努力结果以便制止非洲的脊髓灰质炎流行快速选定地区采用单价脊髓灰质炎疫苗

    youdao

  • The success in Niger and Egypt is the result of intense efforts in 2004-05 to halt Africa’s polio epidemic and fast-track the introduction of monovalent polio vaccines into selected areas.

    尼日尔埃及成功2004-05强化努力结果以便制止非洲的脊髓灰质炎流行快速选定地区采用单价脊髓灰质炎疫苗

    youdao

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