Some polio-free countries may also require travellers from Pakistan to be immunized against polio in order to obtain an entry visa.
某些无脊髓灰质炎的国家也可能会要求来自巴基斯坦的旅客进行脊髓灰质炎免疫接种，以获得入境签证。
They would then be immunized as a way to prevent the cancer from coming back and spreading.
然后，对他们进行免疫接种，来防止癌症复发扩散。
International travellers to and from polio affected areas should continue to be adequately immunized against polio as recommended in Chapter 6 of International travel and Health guidance.
正如《国际旅行与健康》指导第六章所提出的建议，往来受到脊髓灰质炎影响地区的国际旅客应当继续充分获得预防脊髓灰质炎的免疫接种。
International travellers to and from polio affected areas should continue to be adequately immunized against polio as recommended in Chapter 6 of International travel and Health guidance.
正如《国际旅行与健康》指导第六章所提出的建议，往来受到脊髓灰质炎影响地区的国际旅客应当继续充分获得预防脊髓灰质炎的免疫接种。
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