 Together with Crohn's disease, about 11.2 million people were affected .Each year, ulcerative colitis newly occurs in 1 to 20 per 100,000 people (incidence), and there are a total of 5-500 per 100,000 individuals with the disease (prevalence).In 2015, a worldwide total of 47,400 people died due to inflammatory bowel disease (UC and Crohn's disease).