COVID-19 contact investigation and management comprised of the following: 1) determination of the location of the contact (patient route), 2) exposure risk evaluation, 3) contact classification, and 4) contact management. The location of the contact was determined through the process of preliminary identification, by interviewing patients, and their acquaintances, and by objective verification of the investigated information. Exposure risk evaluation was performed depending on the route of disease transmission, patient characteristics, and environmental characteristics. Based on the results of the evaluation, the contacts were classified into close and casual contacts depending on the exposure [4]. The method of managing the classified contacts was largely distinguished between movement restriction and symptom monitoring. Movement restriction is a legal public health order, and quarantine (isolation), home isolation, or controlled travel is enacted. Symptom monitoring was performed as either active or passive monitoring, depending on the exposure risk (Figure 1).