来自《耶鲁大学开放课程：生物医学工程探索 第9集 第9集》

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  but even more severe than normal;
  有时也许比平常的更加严重
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  aches; and a rash.
  疼痛 皮疹
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  And this is what's characteristic of smallpox,
  这是天花的特征
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  is that as the virus spreads through your body,
  当病毒传遍全身时
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  it particularly, it particularly affects cells of your skin.
  它特别的 特别地作用于皮肤细胞
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  So, you get a rash, or a redness of the skin.
  所以 你会出皮疹 或者皮肤变红
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  And then you would recover for a while,
  接着你会暂时恢复
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  that initial phase of the illness would disappear,
  在开始阶段出现的症状会消失
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  your fever might go down,
  你的体温会降下来
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  you might appear to be normal.
  看起来似乎比较健康
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  Then you start to get lesions on your skin
  然后你的皮肤就会遭到损害
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  that are very characteristic of smallpox.
  这就是天花的典型特征