35-year-old woman developed fever, chill, and myalgia on January 18, 2020, and arrived at the Incheon airport from Wuhan on the next day. After laboratory-confirmed diagnosis of SARS-CoV-2 infection, she developed nasal congestion, cough, and sputum. Oxygen supplementation was started on day 4 of her illness, and her oxygen requirement increased to 6 L/min on day 7 of illness. Fever persisted for ten days and her maximum body temperature during her illness was 38.9°C on day 7 of illness.
The patient's oropharyngeal samples were obtained by using UTM™ kit containing 1 mL of viral transport media (Copan Diagnostics