He did a good job in preparing the initial studies to show that it was safe.
他在最初的实验中,做了很好的工作,以证明疫苗是安全的
I think the smallpox vaccine we made now would probably be better, more effective, and safer than the vaccines we made in the '50s.
我相信若我们现在制造天花疫苗,应该会比五十年代的更有效更安全
And so they're already very safe, very effective vaccines available for many infectious diseases.
所以这些疫苗非常安全有效,常备用来对付各种传染病
Then, they did preliminary studies of safety and effectiveness in people.
接着,研究人员对疫苗在人体中的,安全性和有效性进行初步研究
There's a lot of engineering that we've already talked about in terms of producing quantities of the vaccine, producing it reliably, producing it safe, distributing it, and keeping track requires a level of sophistication that maybe you wouldn't have thought about initially.
我们已经讲过很多工程方面的内容,比如大批量制造疫苗,制造可靠的疫苗,制造安全的疫苗,分派发放疫苗,以及一个完善的随访监测系统,你们最早可能没有想过这些冬夜
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