Novel coronavirus pneumonia is a public health emergency of global concern, characterized by high contagiousness, long incubation period, and easy mutation. Clinical symptoms vary individually and are generally characterized by fever, dry cough, and malaise, which can lead to respiratory failure or even death in severe cases. In most patients with the common type of New Guan infection, the first symptoms are mainly fever, dry cough, chest tightness, shortness of breath, malaise, coughing sputum, and possibly coughing up blood. Nasal congestion and runny nose are not seen, and upper respiratory tract infection symptoms such as sore throat and pharyngeal discomfort are rarely seen. Some patients may show signs of poor nausea, abnormal taste, and loss of smell, and a few have symptoms of gastrointestinal discomfort such as abdominal pain, diarrhea, nausea and vomiting, while some patients do not show any symptoms and are called asymptomatic infected patients. The median age of patients with general infection is 49 years old and with underlying diseases, including diabetes, hypertension and cardiovascular disease. Severely ill patients are significantly older and have more underlying disease of their own, most often presenting with respiratory distress and hypoxemia 1-2 weeks after onset. The majority of patients with novel coronavirus infection are usually of the mild and common type, while a small number of patients with the severe and critical type may rapidly progress to acute respiratory distress syndrome and may eventually die. The primary target organ of novel coronavirus pneumonia is the lung, but findings suggest that novel coronavirus pneumonia may also involve other organs. If you experience symptoms similar to those described above and have a history of exposure related to novel coronavirus, you need to be protected and promptly screened at a hospital for possible novel coronavirus infection, and if diagnosed, you need to be treated early to avoid delaying the disease.