Viral hepatitis, in terms of etiology, mainly includes hepatitis caused by several viruses such as Hepatitis A, Hepatitis B, Hepatitis C, Hepatitis D, Hepatitis E, non-A, and non-E.

In terms of clinical classification, it mainly includes five types: acute hepatitis, chronic hepatitis, liver failure, cholestatic hepatitis, and hepatitis cirrhosis.

Among them, Hepatitis A and Hepatitis E can easily cause acute hepatitis, and Hepatitis B can also lead to the occurrence of acute hepatitis. The most common types of chronic hepatitis are Hepatitis B and Hepatitis C, which can progress to cirrhosis if not promptly controlled. Liver failure can be caused by these viruses as well, with liver failure caused by Hepatitis B being the most common.