Cerus is no religious organization, but it does preach the power of purity. The firm develops blood purification systems under the name INTERCEPT that kill bacteria, viruses, and other pathogens in donated blood to improve the safety of blood transfusions. Its INTERCEPT Blood Systems for platelets and plasma are approved for sale in some European and Middle Eastern countries, where they are marketed directly to customers through subsidiary Cerus Europe. The company is pursuing regulatory approval for its INTERCEPT plasma and platelets products to sell them in the US market, as well as in other foreign countries. Cerus also has a system for red blood cell purification in clinical development.