incidence of a disease

• 发病率

incidence of a disease的用法和样例：

例句

1. There's a high incidence of heart disease there.
   那个地方心脏病的发病率很高。
2. The study shows an increase in the disease among the elderly.
   这项研究证明这种疾病在老年人群中的发病率呈上升趋势。