Of the blood that has to be destroyed, almost half is caused by the presence of Hepatitis B, Hepatitis C,and syphilis, while the other half is due to problems in the collection process.

VOA: standard.2010.06.04

B has to be caused by something and A happened first, so they assign causality.

如果B真的因为某些事情而发生了，而A又在之前发生，所以他们刻意安排这种因果关系。

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So, polio--the disease caused by polio can be a paralytic disease, crippling, and in some cases can lead to death if the disease progresses in certain ways.

小儿麻痹症便是由脊髓灰质炎病毒引起的,如果脊髓灰质炎发展到一定程度,患者不仅会瘫痪或者残疾,一些病例甚至可能死亡

耶鲁公开课 - 生物医学工程探索课程节选

Humoral comes from the term humours and it used to be that we thought about disease as being caused by the balance of humours in our blood.

体液一词来源于体液学说,过去认为疾病的产生,与血中的体液平衡有关

耶鲁公开课 - 生物医学工程探索课程节选