The polio vaccine has saved millions of lives.
脊髓灰
炎
挽救了数以百万计的生命。
炎,小儿
疹;
;;The polio vaccine has saved millions of lives.
脊髓灰炎挽救了数以百万计的生命。
She was struck down by polio at the age of four.
她四岁那年因小儿
痺
死去。
Children have been routinely immunized against polio since 1958.
自从1958 年以来，儿童都按照常规接种防治小儿
的。
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