And I've already given you some clues about this, in that this process of vaccination that Jenner had developed was intentionally injecting into healthy patients, a microorganism.

我刚刚已经向你们提示了一些,在詹纳发明的接种过程里,故意把微生物注射到健康病人身上

耶鲁公开课 - 生物医学工程探索课程节选

It's totally synthetic, there's no micro-organism involved in making the DNA for you, You can do it very rapidly in a laboratory, and fairly inexpensively now.

完全是复制的过程,没有任何微生物参与制造DNA,你可以在实验室里迅速地进行,费用现在也相当便宜了

耶鲁公开课 - 生物医学工程探索课程节选