Children have been routinely immunized against polio since 1958.
自从1958 年
来，
童都按照常规接种防治
痹症的疫苗。
痹症疹;
;
行性感冒;Children have been routinely immunized against polio since 1958.
自从1958 年来，童都按照常规接种防治痹症的疫苗。
The polio vaccine has saved millions of lives.
脊髓灰质炎疫苗挽救了数百万计的生命。
She was struck down by polio at the age of four.
她四岁那年因痺症死去。
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