The Patient 1 had pneumonia as early as three days after the symptom onset, although her condition was stable.2 During the first 3 days, she did not develop any clinical features suggesting pneumonia. If an early high-resolution computed tomography scan of the lungs had not been taken, the pneumonia would not have been diagnosed. This suggests that the possibility of 2019-nCoV pneumonia cannot be excluded based only on the clinical clues. And the patient is still in a severe clinical course with high oxygen demand for more than two weeks.2 Based on this clinical course, although the 2019-nCoV is tentatively known to have less severity of the disease than SARS, the virulence of the disease needs to be evaluated more carefully.