Children have been routinely immunized against polio since 1958.
1958 
，
都按照常规接种防治小麻痹症的疫苗。
麻痹症Children have been routinely immunized against polio since 1958.
1958 ，都按照常规接种防治小麻痹症的疫苗。
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.
她四岁那因小麻痺症死去。
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