Inveterate viral hepatitis is a group of infections caused by viruses that affect liver cells. Under the influence of the virus, liver cells are damaged, inflammation begins in the organ, that is, in fact, hepatitis, which can present both in the form of occurring complaints and symptoms, and in the form of pathological abnormalities in laboratory parameters. It is important to understand that these signs are only a consequence of cell damage and death, as well as the inflammatory process occurring in the organ. Hepatitis is called inveterate if the inflammatory process lasts more than six months. The disease is caused by viruses of hepatitis B, C and D (delta) - the hepatitis A virus, as a rule, provokes an acute form of the disease.