Novel coronavirus infection is an acute infection, and early symptoms may include muscle aches and pains, generalized weakness, etc. As the disease progresses, patients may develop fever, with most patients having a temperature of 37.3°C or higher. As the disease progresses, patients may develop fever, with most patients having a body temperature of 37.3°C or higher. At this time, respiratory symptoms may appear, such as dry cough, nasal congestion, runny nose, sore throat, diarrhea and so on. As the symptoms gradually worsen, they may manifest as dyspnea, chest tightness, panic attacks, or even serious manifestations such as respiratory distress. However, the timing and severity of symptoms may vary from person to person due to individual differences in the infected person. Patients with severe and critical forms of novel coronavirus infection may also have only low to moderate fever or even no significant fever during the course of the disease. Patients with mild forms of the disease may have symptoms such as low-grade fever and mild malaise, and a few patients may test positive for nucleic acid with no obvious clinical signs.