Patients with novel coronary pneumonia may initially have respiratory symptoms such as dry cough and fatigue, or systemic symptoms such as muscle aches and pains. 1. Respiratory: dry cough, sore throat, fever, nasal congestion, runny nose, and decreased or loss of sense of smell may occur. 2. Systemic symptoms: myalgia, diarrhea, conjunctivitis, hyposmia, hyposmia or loss of taste may occur. Severe patients tend to develop respiratory distress and/or hypoxemia one week after the onset of the disease, and severe cases may rapidly progress to some critical complications. However, it is worth noting that patients with the severe and critical form of the disease may have a low to moderate fever or even no significant fever during the course of the disease. Others may have no obvious clinical symptoms after infection with the new coronavirus, also known as asymptomatic infections.