来自《耶鲁大学开放课程：1600年后西方社会的流行病 第10集 第10集》

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  in a single street, for some time.
  在单独一条街道上传播
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  Now, in fortunate instances, the disease, this outbreak,
  如果幸运的话 这种疾病
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  this so-called sporadic cholera, would just fade away,
  即所谓的单发性假霍乱 会逐渐消失
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  and the community would escape a large-scale misfortune.
  整个社区因此避免了大规模的不幸
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  But if the Vibrio gained access to the city's water supply,
  但是 如果霍乱弧菌接近了城市的水源
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  then the disease would flare up with epidemic force,
  这种疾病便会因为流行而突然加剧
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  and this would be what the nineteenth century health authorities
  这便是十九世纪卫生当局
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  called epidemic cholera, instead of sporadic.
  所称的流行性霍乱 而非单发性
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  And if you made a graph of cases and deaths,
  如果就病例和死亡制出一个图表
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  there'd be a sudden spike in mortality and morbidity.
  在死亡率和发病率方面会有一个激增峰值
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  Well, what would be the likely magnitude of the disaster
  如果说一个主要欧洲城市
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  that would follow if, let us say,
  其供水系统被霍乱病菌所污染