The new coronavirus is now mainly invading the respiratory tract, such as fever and cough. When such symptoms occur, individuals should first conduct a self-assessment: if there are no symptoms of chest tightness or shortness of breath, and if they are in good health, they can first be observed at home in isolation, open windows and wash hands regularly. When the following conditions occur, you should wear a good mask and go to the hospital for treatment: 1. Symptoms do not improve significantly after 1-2 days of observation at home; 2. Recent close contact with people with fever or cough or a history of wildlife contact; 3. Patients are elderly, pregnant women or people with lung disease, cardiovascular disease, or low immunity.