A series of cases of pneunomia of unknown cause was reported in Wuhan, in late December 2019.  Epidemiological data demonstrated person-to-person spread is the main mode of transmission, which resulted in a worldwide outbreak. World Health Organization (WHO) designated COVID-19 as the official name. The pathogen was confirmed to be severe acute respiratory syndrome  coronavirus 2 (SARS-CoV-2), a betacoronavirus. Standard  technique to confirm COVID-19 is nucleic acid  testing with reverse transcription polymerase chain reaction (RT-PCR) and/or  next-gen sequencing (NGS) methods. Imaging features differ in different individuals and stages of the COVID-19 penumonia, and they are also different from other infectious pulmonary diseases.