Viral hepatitis is an infectious disease caused by several different kinds of hepatovirus. Mostly it causes prolonged infl ammation and necrotic lesions in the liver. It is highly contagious with a high incidence in Southeast Asia and is widely transmitted via complex routes. To date, fi ve types of hepatitis have been discovered: hepatitis A to E. Among these, hepatitis A and E generally cause acute hepatitis, while hepatitis B, C and D may be related to acute or chronic hepatitis, and most likely lead to cirrhosis and hepatocellular carcinoma (HCC).