Patients with novel coronavirus infection can have a fever, mostly high, with a body temperature greater than 38.5°C. Some patients may have a low-grade fever. However, patients with novel coronavirus infection without fever can sometimes be seen, usually in patients with mild or critical illnesses. Of course, fever can be caused by a variety of factors, including viral and bacterial infections, as well as non-infectious factors such as leukemia, lymphoma, and rheumatic connective tissue disease, which can also cause fever of varying degrees. Therefore, patients with fever must be asked about their epidemiological history and have early blood tests and chest CT. When a viral lung pattern is seen, early detection of novel coronavirus nucleic acid in respiratory specimens or blood should be done to rule out the presence of neo-coronavirus pneumonia.