advances were reproduced across Europe

和进步在欧洲和北美
and North America.

反复上演着
And there were technological improvements as well--

那时还有许多技术改善
all of which leads me to the end of this morning--

这些都导致了我要讲的最后一点
which is to say in 1959, the World Health Organization

就是在1959年世界卫生组织
undertook the unprecedented step of launching a global smallpox

做了一项前无古人的决定启动一个
eradication program by means of vaccination.

通过接种在全球范围内消灭天花的项目
In 1977, the final natural

在1977年最终时刻
case occurred.

自然来临了
And in 1980, smallpox was declared,

在1980年世界卫生组织宣布
by the WHO, eradicated everywhere on the globe.

地球各处都已经没有了天花
So, vaccination then comes with

所以疫苗接种翻开了