Among the many images of the famous mill girls is this one, taken in 1850,I believe, in Lowell, Massachusetts.

在众多图片中,著名的纺织女工是其中之一,大概拍摄于1850年,在洛威尔纺织厂,马萨诸塞州

耶鲁公开课 - 美国内战与重建课程节选

And in particular, dairy maids, whose responsibility was to milk cows, and so they had a very intimate relationship with cattle, often didn't get disease.

特别是挤奶女工,她们的工作就是挤奶,她们与奶牛有紧密的关系,通常不会得天花

耶鲁公开课 - 生物医学工程探索课程节选

And he hypothesized that they were getting the disease in cows, which the disease from cows that caused a milder disease than smallpox, and that protected them from getting the more severe forms of smallpox later.

他假定奶牛将这种疾病传染给挤奶女工,这种源自奶牛的疾病比天花更温和,它保护女工们,免受更为严重的天花感染

耶鲁公开课 - 生物医学工程探索课程节选