Letter to the editor Rae Na, Kuenyoul Park, Heungsup Sung, Mi-Na Kim Departments of Laboratory Medicine, University of Ulsan College of Medicine and Asan Medical Center, Seoul, Korea Corresponding to Mi-Na Kim, E-mail: mnkim@amc.seoul.kr Ann Clin Microbiol 2022;25(3):103-107. https://doi.org/10.5145/ACM.2022.25.3.6Received on 4 July 2022, Revised on 31 August 2022, Accepted on 31 August 2022, Published on 20 September 2022.Copyright © Korean Society of Clinical Microbiology.This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Dear Editor,  Since the first confirmed case of coronavirus disease 2019 (COVID-19) on January 20, 2020, a total of 719,269 COVID-19 patients have been confirmed in Korea. A total of 10,874 cases were currently treated under quarantine in January 21, 2022. As of August 7, 2022, the number of COVID-19 patients

Original article Kuenyoul Park1, Kyu-Hwa Hur2, Heungsup Sung1, Sang-Ho Choi3, Mi-Na Kim1 1Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, 2Department of Laboratory Medicine, Uijeongbu Eulji Medical Center, Eulji University, Uijeongbu, 3Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea Corresponding to Heungsup Sung, E-mail: sung@amc.seoul.kr Ann Clin Microbiol 2022;25(2):41-46. https://doi.org/10.5145/ACM.2022.25.2.2Received on 11 February 2022, Revised on 1 April 2022, Accepted on 22 April 2022, Published on 20 June 2022.Copyright © Korean Society of Clinical Microbiology.This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: The concurrent detection of human cytomegalovirus (CMV) with UL97 and UL54 mutations is crucial for prescribing adequate antiviral treatment when drug-resistant CMV infection is suspected.