The following conditions need to be met to confirm the diagnosis of new coronavirus pneumonia: 1. contact with infected patients within 14 days; 2. laboratory tests reveal reduced white blood cell and lymphocyte counts, and pharyngeal swabs and respiratory secretions can reveal novel coronavirus nucleic acids; 3. impacted studies reveal the presence of small patchy shadows and interstitial changes in the lungs, and as the disease progresses it will show multiple ground glass shadows in both lungs, and patients with severe disease may develop solid lung changes; 4. blood specimens are sequenced for viral genes and are consistent with known novel coronaviruses.