jí kòng / rén yuán / zhèng zài / diào chá / zhè cì / yì qíng / de / chuán rǎn yuán / yǐ biàn / jǐn kuài / qiē duàn / chuán bō liàn

疾控人员正在调查这次疫情的传染源，以便尽快切断传播链。

Disease control workers are investigating the source of this outbreak so that they can break the chain of transmission as soon as possible.