Assertion: chronic hepatitis b | /r/AtLocation | africa
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Source sentences:
text: Chronic hepatitis B is more common in Africa, Asia, and parts of the Middle East, Eastern Europe, and South and Central America than it is in the United States.7 Chronic hepatitis B infection has been especially common in some parts of the world, including sub-Saharan Africa, parts of Asia, and the Pacific Islands.5,8 Use of the hepatitis B vaccine has helped lower infection rates in some of these areas.7,9