Originally known as serum hepatitis, Hepatitis B has only been recognized as such since World War II, and has caused current epidemics in parts of Asia and Africa. Hepatitis B is recognized as endemic in China and various other parts of Asia. Over one-third of the world's population has been or is actively infected by hepatitis B virus (acronym HBV).

A narrowing of the biliary tract from scar tissue. The scar tissue can result from injury, disease, or infection.

Hepatitis B as related to Biliary stricture