Pneumonia due to novel coronavirus generally refers to novel coronavirus pneumonia, the principle of which is mainly due to infection with novel coronavirus. When the novel coronavirus infects the human body, it binds through the angiotensin-converting enzyme receptor II in the alveolar epithelium, causing the alveolar epithelial cells to detach. When human cells are infected with the novel coronavirus, the virus transcribes and replicates nucleic acids within the cells, leading to necrosis of the alveolar epithelial cells, which is cleared by lymphocytes, ultimately causing pneumonia. Novel coronavirus pneumonia is usually caused by respiratory droplets, contact transmission, and aerosol transmission. After entering the lung tissues, the novel coronavirus grows and multiplies in the lung tissues, causing congestion and edema of the lung tissues in the body and inflammatory infection. Since the human body lacks immunity to the novel coronavirus, the population is generally susceptible, especially the elderly and those with underlying diseases. Patients with novel coronavirus pneumonia need to be isolated, rested, maintain a good routine, pay attention to diet and balanced nutrition. Adjust bad mood, moderate exercise, quit smoking and drinking. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.