Fever without cough is not necessarily a new coronavirus infection. It is true that patients with novel coronavirus infections can have a fever and no cough. However, on the other hand, a fever without cough is not necessarily a new coronavirus infection, because many diseases can present with fever as a symptom. From the cause of fever can be divided into infectious and non-infectious diseases, infectious diseases can cause fever, the most common is the cold bronchitis, pharyngitis, pneumonia and so on. Infections of the digestive system, such as gastroenteritis, as well as intestinal bacterial infections or parasitic infections can cause fever. Non-infectious diseases such as blood disorders, immune disorders, and tumors can also cause fever. So to diagnose a new coronavirus infection, you have to have a positive nucleic acid test for the new coronavirus to be able to confirm the diagnosis.