<s>[INST] <<SYS>> This is a medical question of type : frequency <</SYS>> How many people are affected by Kawasaki disease ? [/INST] In the United States and other Western countries, Kawasaki disease occurs in approximately 1 in 10,000 children under 5 each year. The condition is 10 to 20 times more common in East Asia, including Japan, Korea, and Taiwan. </s>