(epidemiology) To identify everyone with whom a person carrying an infectious disease has come into contact since contracting the disease.

simple past tense and past participle of contact trace

A means of combating coronavirus by taking samples from individuals and instructing those who are infected to isolate themselves from others and provide details of their recent close contacts, who are also told to isolate.

To keep or have a record of an item's location using track and trace.

A process of determining the current and past locations (and other information) of a unique item or property.

Alternative form of without a trace

Third-person singular simple present indicative form of leave no trace

To follow certain outdoor ethical guidelines while camping, etc., so thoroughly that it would appear as though one had never previously been there, for the sake of nature conservation.

present participle of leave no trace

simple past tense and past participle of leave no trace