The last reported case of smallpox in the-- naturally occurring smallpox, was in 1977, a man in Somalia was infected.

最后一例天花报告,自然产生的天花,是在一九七七年,一个索马里人感染了

耶鲁公开课 - 生物医学工程探索课程节选

And I talked about eradicating smallpox in 1977, right when officially the last case was reported, and it was certified to be eradicated shortly after that.

我刚刚已经讲了一九七七年根除天花,当时发布了最后一例官方报告,自此之后,天花已经确认根除

耶鲁公开课 - 生物医学工程探索课程节选