Clinical signs of recurrent fever can occur with novel coronaviruses, which cause upper respiratory tract infections that lead to a variety of diseases of the lungs. Usually patients will present with severe acute respiratory syndrome. Clinical symptoms may be characterized by recurrent fever, malaise, dry cough, and progressive respiratory distress, and in severe cases, respiratory distress, sepsis, uncorrectable metabolic acidosis, and coagulopathy. Some patients have very mild symptoms, and will not have obvious high fever, often due to low fever, but in the course of the disease if the control is not good, there will be a gradual fever, and fever is not controlled in time, there will be recurrent clinical manifestations of fever.