因为，你暴露于某种感染性的疾病后，决定你是否生病的最终因素，是你的免疫系统的状态。

Because, ultimately, it is the state of your immune system that determines whether or not you get sick when you're exposed to an infectious disease.

youdao

目的探讨感染性心内膜炎(IE)的病因、致病微生物的变化、临床变迁及预后等因素，提高IE的诊治水平。

Objective to investigate causes, change of pathogenic microorganism, clinical vicissitudes and prognosis in infective endocarditis (IE) to improve the diagnosis and treatment of IE.

youdao

目的探讨感染性腹泻的相关因素。

Objective to explore the correlation factor of infectious diarrhea.

youdao

Now in some--in the chronic respiratory diseases there's some infection but most of the other things are caused by lifestyle or by other factors, not the infectious diseases.

如今一些,如慢性呼吸道疾病,有一些是传染所得,但大多数,都是生活方式或其他因素导致的,而不是感染性疾病

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选