I. Introduction
Over the past three years, the Coronavirus disease 2019 (COVID-19) pandemic has resulted in numerous casualties worldwide, profoundly impacting various aspects of daily life. During COVID-19 outbreaks, the most effective approach is to isolate high-risk individuals and implement protective measures, as the virus's primary mode of transmission is human-to-human contact. Consequently, analyzing transmission relationships is crucial for preventing and controlling future spread. It is essential to gather detailed information about confirmed cases, encompassing factors such as close contacts, travel itineraries, and other pertinent data, to facilitate appropriate action. Epidemiological investigations serve to uncover the majority of information needed.