据官方媒体报道，职工们举着电子显示器，写到：严惩袭击者，还自尊于医生。

"Punish the attacker severely and give dignity back to doctors," read a digital sign set up by the staff, according to state media.

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但是，它的准确性取决于医生的专业水平以及病人具有身体反应的能力。

But its accuracy depends on a doctor's expertise and upon patients being able to respond physically.

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如此混乱也在意料之中，因为这些案件所依据的法规成文于医生完全弄清引起传染的病菌之前。

Chaos might be expected given that the law employed in such cases was written before doctors fully grasped that germs caused contagious diseases.

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In fact, there's evidence that even thousands of years ago, Indian and Chinese healers were using a form of something that we would recognize as vaccination.

事实上,有证据表明在几千年前,印度和中国的医生就在使用一种,类似于疫苗的东西

耶鲁公开课 - 生物医学工程探索课程节选