Kawasaki disease in young children is not an infectious disease, but a disease of the immune system, mainly transmitted through the respiratory tract. The cause of the disease is not well understood, but epidemiological data suggest that it is associated with a variety of pathogens, such as rickettsia, staphylococcus, streptococcus, and mycoplasma infections. The clinical picture is one of persistent high fever with rash and lymph node enlargement, typical conjunctival congestion, and ineffective treatment with antibiotics, with an insidious onset and a poorly understood pathogenesis.