Pfizer denies that it acted improperly, but the catastrophe helps to explain why people in Kano became suspicious of the polio vaccine several years later.

 
  • Pfizer否认自己行为不当,但是这场灾难有助于解释卡诺的人们为什么对数年之后的脊髓灰质疫苗持有疑心。
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