incidence indicator

例句：

1. 1.The incidence rate of this disease has been decreasing in recent years.
   近年来，这种疾病的发病率正在下降。
2. 2. The incidence indicator is a crucial factor in predicting the spread of the virus.
   发病率指标是预测病毒传播的关键因素。
3. 3. The study aims to identify the factors that contribute to the high incidence of childhood obesity.
   该研究旨在识别导致儿童肥胖率高的因素。