surveillance of disease

例句：

1. 1. The hospital is conducting surveillance on the outbreak of infectious diseases.
   医院正在对传染病爆发进行监控。
2. 2. The government has launched a campaign to improve surveillance of diseases.
   政府已经启动了一个运动，以提高对疾病的监控。
3. 3. The surveillance system helps to detect and prevent the spread of diseases.
   这个监控系统有助于检测和预防疾病的传播。