The disease is spread in several African, Asian and Latin American countries. In some cases the virus was also carried into Europe. After the bacteria have invaded the body, the incubation time is quite short, 1-2 days.

Approximately 22 million infections occur in the world annually, of which about 200.000 people die.

Chronic disease can get formed. 15-20% of patients suffering from chronic hepatitis dies due to the complications, and liver cancer may develop.