Schistosomiasis affected about 252 million people in 2015. An estimated 4,400 to 200,000 people die from it each year. The disease is mainly found in Africa, Asia, and South America. About 700 million people, in more than 70 countries, live where the disease is common. In tropical countries, schistosomiasis causes a great economic problem. Schistosomiasis is listed as a neglected tropical disease.