Fever and chills are not necessarily due to the new coronavirus, but may also be due to tonsillitis and bacterial colds. 1. New coronavirus: It is a coronavirus of the genus β, which causes new coronavirus pneumonia after invading the human body. Infection with this disease will appear fever, fear of cold, in addition, dry cough, fatigue as the main manifestation. 2. Tonsillitis: Tonsillitis is a more common disease in ENT, with typical clinical manifestations such as sore throat, chills, headache, etc. Some patients may also experience severe fever. 3. Bacterial upper respiratory tract infection: a disease caused by exposure to bacterial pathogens that multiply rapidly in the body. Infection with this disease will appear sore throat, fever and chills, tonsils red and swollen and other symptoms. Fever and chills have a variety of possible causes, not necessarily the new coronavirus, patients should go to the regular hospital in a timely manner to determine the cause of the disease, to take targeted treatment. [Tip] This article refers to “new coronary pneumonia, new coronary virus pneumonia”, etc., on December 26, 2022, the National Health Commission issued a notice to change the name to “new coronary virus infection”.