Symptoms manifested on days 1-7 of the new crown are mainly characterized by malaise, dry cough, and fever. At the same time, some patients may experience conjunctivitis, runny nose, nasal congestion, decreased or loss of smell and taste, sore throat, myalgia, and diarrhea, and some patients may be asymptomatic. Novel coronavirus is a coronavirus of the genus β. It can be transmitted mainly through respiratory droplets and close contact, and is generally susceptible to the population. Patients with mild symptoms may have mild malaise and low-grade fever, with no obvious signs of pneumonia. Severe patients can rapidly develop hypoxemia, respiratory distress and other symptoms within a week of the onset of the disease, and in severe cases, sepsis, shock, metabolic acidosis, coagulation dysfunction, acute respiratory distress syndrome, multi-organ failure and other symptoms can occur. It should be noted that: after the infection of new crown pneumonia, need to be isolated as soon as possible for treatment. Tip: 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.