Insufficient Sensitivity of RNA Dependent RNA Polymerase Gene of SARS-CoV-2 Viral Genome as Confirmatory Test using Korean COVID-19 Cases

College of Medicine, Chosun University, Gwangju, Republic of Korea; Department of Laboratory Medicine, Myongji Hospital, Hanyang University College of Medicine, New Horizon Cancer Institute, Myongji Hospital, Department of General Surgery, Myongji Hospital, Department of Laboratory Medicine, Myongji Hospital, Hanyang University College of Medicine, Department of Infectious Diseases, Myongji Hospital, Goyang, Republic of Korea; PCL Inc., Seoul, Republic of Korea; Department of Biomedical Engineering, Dongguk University, Seoul, Republic of Korea; Department of Chemistry, Sungkyunkwan University, Suwon, Republic of Korea