Kawasaki disease affects children of all races and ages and both genders. It occurs most often in children of Asian and Pacific Island descent.
The disease is about 1.5 times more likely to affect boys than girls. Most cases occur in children younger than 5 years old. Kawasaki disease is rare in children older than 8 years.
This answer from the National Heart, Lung and Blood Institute has been reviewed and/or edited by Dr. William D. Knopf.