A previously healthy 71-year-old man visited the Community Health Center on February 22, presenting 12 days of fever and cough. He underwent an examination of SARS-CoV-2 via real-time reverse transcription polymerase chain reaction (rRT-PCR) and diagnosed as COVID-19. He admitted to the local public medical center and 400 mg of hydroxychloroquine once daily was started. A chest radiograph obtained on day 2 showed mild opacities in the right lower lung, lopinavir/ritonavir 400 mg/100 mg twice daily was added. However, on day 3, oxygen demand increased, so he transferred to the tertiary-care hospital.