Kawasaki disease, also known as mucocutaneous lymph node syndrome, is a common pediatric fever and rash illness, primarily a systemic small vessel vasculitis. Kawasaki disease is not contagious, so it has no incubation period; only infectious diseases have incubation periods. If it were contagious, typical manifestations would include persistent high fever, pinpoint appearances around the eyes and mouth, typical rash, swelling of the hands and feet, and non-purulent swelling of the cervical lymph nodes. Therefore, Kawasaki disease has no incubation period and is a vasculitis mediated by immune mechanisms.