In Kawasaki disease, as in many other serious conditions, early diagnosis and prompt treatment are of vital importance. Recognizing the disease early and intervening swiftly accelerates the control of fever and other acute symptoms, significantly reducing the risk of heart damage. Treatment typically involves a combination of high-dose intravenous immunoglobulin (IVIG) and high-dose aspirin. Immunoglobulin is a special preparation containing antibodies derived from the liquid part of blood. Studies clearly demonstrate that IVIG treatment administered within the first 10 days of disease onset reduces the incidence of coronary artery abnormalities from approximately 20% in patients receiving only aspirin therapy to as low as 3%.