If you have sputum in the throat and cannot cough or swallow, you may have coronavirus infection, but you need to ask if you have a history of exposure to infected areas or places. If there is a clear epidemiological history and also a combination of phlegm in the throat, coronavirus infection cannot be ruled out, and routine blood tests and chest CT tests are needed to clarify. If there is no clear manifestation of chest tightness and coughing, coughing, dizziness and weakness, observation is needed for the time being, and if necessary, blood routine and inflammatory markers related tests need to be perfected and treated as common upper respiratory tract infection.