Starting in December 2019, cases of pneumonia with unknown causes began to appear in Wuhan, Hubei province, China. Subsequently, the outbreak of this pneumonia quickly spread throughout the Hubei province, country, and world. This pneumonia was confirmed to result from a novel coronavirus infection according to whole-genome sequencing [1]. On January 13, 2020, the World Health Organization tentatively named the virus as 2019 novel coronavirus (2019-ncov). On February 7, 2020, China officially named this novel coronavirus pneumonia as NCP. Later, on February 11, 2020, the World Health Organization officially renamed the NCP as coronavirus disease 2019 (COVID-19) [2]. COVID-19 is mainly characterized by pulmonary inflammation, which can cause damage to the gastrointestinal tract, liver, and nervous system [3], [4]. It can also cause fever, cough, and other symptoms [5], [6]. The clinical manifestations are similar to those of other viral infections, and thus differential diagnosis from other viral infections is necessary.