Vomiting alone may not necessarily be novel coronavirus pneumonia because many causes can cause vomiting, such as colds, acute gastritis, acute gastroenteritis, etc. It is not possible to determine whether a single manifestation of vomiting is novel pneumonia. Based on the characteristics of the current clinical cases, the typical symptoms of novel coronavirus infection are fever, dry cough, and malaise as the main clinical manifestations. As the disease progresses, respiratory symptoms such as dyspnea and hypoxemia gradually appear, and a few patients are accompanied by nasal congestion, runny nose, sore throat and diarrhea. Some cases in children and newborns have atypical symptoms, manifesting as gastrointestinal symptoms such as vomiting and diarrhea, so they should be alerted. If you want to confirm the diagnosis, you should have one of the four epidemiological histories of novel coronavirus pneumonia, two of the three clinical manifestations, or no epidemiological history but three clinical manifestations, including clinical manifestations of fever, dry cough, and malaise. A routine blood count showing a normal or reduced total white blood cell count, a reduced percentage of lymphocytes, and a typical lung CT with characteristic manifestations of viral infection would be consistent with a suspected case before the next step of nucleic acid testing, gene sequencing, or antibody determination can be performed. Therefore, the diagnosis of novel coronavirus pneumonia cannot be made solely on the basis of vomiting symptoms.