break the chain of transmission 截斷傳播鏈

break the chain of transmission
繁：截斷傳播鏈
简：截断传播链

全民自願參與的普及社區檢測計劃即將開始，被問確診數字回落才做是否太遲，張竹君回應說，昨日9宗確診之中，有4宗屬無源頭個案，佔一半，顯示社區仍有隱形患者，做全民檢測可找到一些無源頭個案，追蹤並截斷傳播鏈的機會大點，多個案時未必能應付得來。

昨9宗確診 第三波首見單位數 張竹君：回落時做全民檢測更易斷傳播鏈（2020年8月25日）。明報，取自 https://news.mingpao.com/pns/港聞/article/20200825/s00002/1598293033264/

Chuang added as half of the locally-transmitted cases today are of unknown sources, 4 cases, there are still ‘invisible patients’ within the community. She said the universal Covid-19 tests could help detect unknown sources and break the chain of transmission.

Hong Kong reports a single-digit of confirmed cases. (2020, August 24). The Standard. Retrieved from https://www.thestandard.com.hk/breaking-news/section/4/153761/Hong-Kong-reports-a-single-digit-of-confirmed-cases