来自《耶鲁大学开放课程：1600年后西方社会的流行病第7集第7集》

featuring people undergoing vaccination while they sprouted

上面画着正在接受接种的人他们长出
horns or turned into cows.

犄角或者变成了牛
But despite vaccination, there was, in Britain,

尽管如此英国出台了
an Act of 1840 that

1840年法案
provided for free infant vaccination.

为婴儿提供免费接种
And from that time, the annual toll from smallpox

从那以后每年因天花而死亡的人数
began to plummet, despite the fact that the

开始直线下降即便在十九世纪
nineteenth century provided conditions that would have been

各种环境都适宜天花病的传播泛滥
favorable to promoting the disease: improved and speedy

改善的快速交通
transport, with steamships,

比如蒸汽船
canals and the railroads; crowding with a population that

加上运河和铁路大量流动性强
was ever more mobile, massive growth and urbanization

增长快速的人口城市化