Kawasaki disease, also known as mucocutaneous lymph node syndrome, currently has unclear pathogenic mechanisms and the causes of the disease are not well defined. One of its main pathological changes is systemic vasculitis, including the coronary arteries. The disease occurs sporadically or in small epidemics, can happen in any season without clear seasonality, and is generally more common in infants and young children, with eighty percent under five years of age. Kawasaki disease is not a contagious disease, so it does not have significant contagiousness.