The infectious disease hepatitis C is caused by the hepatitis C virus (HCV), which affects the liver (location pictured) and is transmitted by blood-to-blood contact. Some of the people diagnosed with the disease have made this known to help raise awareness about hepatitis C and to encourage more people to get tested for the disease. Although HCV was not discovered until April 1989, an estimated 170 million people worldwide are infected by the virus. It is the leading cause of liver transplant in the United States; 8,000–10,000 people die each year in the US from the disease. No vaccine is available at this time. The symptoms of infection can be medically managed when the disease is diagnosed early, and a proportion of patients can be cleared of the virus by a course of anti-viral medicines. The symptoms of HCV infection, especially in its early stages, can be mild enough to conceal the fact of the disease; thus, some people do not seek treatment. As Live Aid founder Bob Geldof states, "Stigma, shame and fear can suffocate awareness. These barriers prevent people from getting tested, receiving treatment, and clearing themselves of this disease". The World Health Assembly has designated 28 July as World Hepatitis Day, in order to raise awareness and understanding of HCV, as well as hepatitis B. (Full list...)