The C-globulin given for Kawasaki disease usually stays in the body for about three weeks. C-globulin, also known as mucocutaneous lymph node syndrome, occurs in children under 5 years of age and infants and young children, with persistent fever, conjunctival congestion, oral mucositis, rash and other main symptoms, but also can be complicated by serious cardiovascular disease. Early application of gammaglobulin can reduce the incidence of coronary artery disease and avoid the occurrence of serious complications. Generally, gammaglobulin can stay in the body for about three weeks after injection, and then it will be gradually excreted, and will not exist in the body for a long time. It is recommended to use the medication under the guidance of a doctor to take prevention as early as possible to avoid complications. After injection, there may be nausea, vomiting, abdominal pain, coughing, dyspnea and other adverse reactions, and you should notify your doctor in case of abnormalities.