Descriptive epidemiology gives us a starting point to understanding the extent of an outbreak.

描述性流行病学为我们理解疾病爆发的程度提供了一个起点。

Measuring incidence and prevalence is the bread and butter of descriptive epidemiology, which represents the state of a disease or other epidemiological issue through data about it.

测量发病率和流行率是描述性流行病学的基础，描述性流行病学通过有关数据来描述疾病或其他流行病学问题的状态。