The polio vaccine has saved millions of lives.
脊髓灰
炎疫
挽救了数以百万计的生命。
炎,小儿麻痹症医>
;
;
;The polio vaccine has saved millions of lives.
脊髓灰
炎疫
挽救了数以百万计的生命。
She was struck down by polio at the age of four.
她四

因小儿麻痺症死去。
Children have been routinely immunized against polio since 1958.
自从1958
以来,儿童都按照常规接
防治小儿麻痹症的疫
。
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