Hepatitis B is an
inflammation of the
liver and is caused by the Hepatitis B virus (HBV), a member of the
Hepadnavirus family and one of hundreds of unrelated viral species which cause viral hepatitis. It was originally known as "serum hepatitis" 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. The proportion of the world's population currently infected with the
virus is 3 to 6%, but up to a third have been exposed. Symptoms of the acute illness caused by the virus include liver inflammation, vomiting,
jaundice, and rarely, death. Chronic hepatitis B may cause liver
cirrhosis which may then lead to
liver cancer, a fatal disease with very poor response to current chemotherapy.
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A virus that causes hepatitis (inflammation of the liver). It is carried and passed to others through blood or sexual contact. Also, infants born to infected mothers may become infected with the virus.
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