[Introduction to the Research Results of Coronavirus Disease 2019 Big Data (K-COV-N) and the Corresponding Utilization Plan].

As part of the effort to establish a scientific basis for quarantine policies aimed at responding to new infectious diseases based on the experience of responding to coronavirus disease 2019 (COVID-19), the Korea Disease Control and Prevention Agency (KDCA) and National Health Insurance Service promoted the establishment of health information big data and signed a business agreement (April 29, 2021). The big data created by combining the KDCA's COVID-19 confirmed cases and vaccination data with the National Health Insurance Service's national health information are known as K-COV-N (KDCA Covid-19 NHIS cohort). The big data constructed were opened to the private sector through the National Health Insurance Service's open platform to promote private research. A cumulative total of 211 cases have been approved since the opening of COVID-19 big data from April 2022 until October 2, 2024, and a total of 30 papers have been published in international journals. The main contents were research results such as COVID-19 infection risk factors, vaccination effects, and long COVID. In addition, after the opening of big data, we held workshops on practical networking for utilizing COVID-19 big data to share analyses and techniques for utilizing the data. Additionally, we established a public-private data analysis network to promote exchanges between practitioners. In addition, we are contributing to the activation of private research by expanding ties with the National Cancer Center and health-information-holding organizations. Accordingly, the KDCA plans to continue opening up infectious disease-related information to develop evidence-based quarantine policies and support expert decision-making.