New coronavirus infection should be judged from various aspects: 1, epidemiological contact history, whether there has been contact with patients with novel coronavirus pneumonia, or close observers, or travel to Wuhan, or stay through infected areas with novel coronavirus pneumonia, streets, etc.; 2, clinical manifestations, most commonly fever, dry cough and malaise, followed by possible respiratory distress in a short period of time. If the above situation may still require prompt medical attention; 3, hospital diagnosis and CT aspects of the examination, diagnosis includes the confirmation test sent samples, including RT-PCR, gene sequencing, etc. Other diagnoses include blood diagnosis, such as lymphocytes, white blood cells, etc., and the diagnosis of enzymatic indicators, CT examination results. The main manifestation of novel coronavirus pneumonia disease is fever, which may be combined with mild dry cough, malaise, dyspnea, diarrhea, etc. Runny and coughing sputum are less common. More patients will have dyspnea after 1 week, and the dry cough may affect sleep when it is more severe. In severe cases, the disease may progress rapidly to acute respiratory distress syndrome, but some patients have relatively mild disease, and more patients recover after 1 week. Content source: Dr. You Lai