How old children are given vaccine against polio in Pakistan? [originaltext]

游客2023-11-19  31

问题 How old children are given vaccine against polio in Pakistan?
Pakistan is working to protect more than thirty million children from polio. Health workers are giving vaccine against the disease to children younger than five years.
     Health officials in Pakistan plan to complete the current vaccination campaign next month. But the government says efforts against polio are always in progress. The efforts are part of an international campaign to stop the disease.

选项 A、4.
B、5.
C、6.
D、7.

答案 A

解析
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