the process of finding any other people that an infected person has met or had close contact with, usually in order to control the spread of an infectious disease

Contact tracing is an important part of HIV control in the UK. 接触者追踪是英国控制HIV感染的重要部分。

Contact tracing can identify high-risk contacts of a person testing positive for Covid-19, who may be asked to self-isolate for 14 days. 接触者追踪能够发现Covid-19测试阳性者的高风险接触者，那些人可能会被要求自我隔离14天。