The recent pandemic of COVID-19 (coronavirus disease 2019), which caused by the SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) started in Wuhan, China at the end of 2019, has recorded more than 30 million cases of infection and over 1 million deaths worldwide to date. Although such conditions are almost a year old, the accessibility of effective vaccines and therapeutics against the COVID-19 virus or disease is still far from the world. Under these circumstances, the global scientific community has made a great deal of dedication and effort to provide insight into COVID-19 knowledge from the very beginning of the pandemic outbreak to the present. Nevertheless, there are also knowledge gaps that are still unknown or need to be clarified. Therefore, in order to broaden the understanding of COVID-19 response, which has already entered the long-term epidemic, the IUMS 2020 and Daejeon Metropolitan City organized three COVID-19 special sessions as follows.