Fever and fever are different names for the same symptom, which refers to the body temperature exceeding the normal range under the action of certain factors and is medically known as fever, commonly referred to as fever. Fever is usually the first and most typical symptom of novel coronavirus infection. Patients often present with a low-grade fever, which may be accompanied by malaise, cough, nasal congestion, runny nose, dizziness, nausea, and aching limbs. Most patients have mild clinical manifestations, and severe cases may have respiratory distress after 1 week; critical cases may progress rapidly and may develop acute respiratory distress syndrome, septic shock, uncorrectable metabolic acidosis and bleeding and coagulation dysfunction, etc.