Novel coronavirus is a new and undiscovered virus, which is highly contagious. Most infected patients have clinical manifestations of fever, accompanied by general malaise, dry cough, lack of energy and loss of appetite, etc. In severe cases, patients will gradually develop respiratory distress. In a small number of critically ill patients, the disease progresses rapidly and complications such as acute respiratory distress syndrome, septic shock, uncorrectable metabolic acidosis and bleeding and clotting dysfunction will soon appear.