Hepatitis is an inflammatory disease of the liver which can lead to scarring, cirrhosis, or cancer of the liver. Hepatitis is also caused by other toxic substances and autoimmune disease which can present similar to viral hepatitis. There are 5 main hepatitis viruses, referred to as types A, B, C, D and E. These 5 types are of greatest concern because of the burden of illness and death they cause and the potential for outbreaks and epidemic spread.