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Disease overview

Viral

Acute hepatitis B

急性乙型肝炎

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Evidence-backed information EN 5/7 applicable sections · ZH 5/7 applicable sections Updated Oct 23, 2026

Acute hepatitis B is a viral infection caused by the hepatitis B virus that can present as a self-limited illness but may progress to chronic infection in some cases [1]. It is associated with severe liver disease and chronic sequelae in certain patients [2].

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Definition

Acute hepatitis B is an acute viral hepatitis caused by the hepatitis B virus, capable of producing both self-limited disease and progression to chronic viral hepatitis [1]. It represents the acute primary infection phase of hepatitis B virus exposure [2].

Clinical features

The illness is usually self-limited, though it may be associated with severe liver disease in some affected individuals [1][2]. A subset of patients experience chronic sequelae following acute infection [2].

Epidemiology

Routine vaccination of infants has greatly reduced the incidence of hepatitis A in the United States [1]. Routine vaccination and universal screening of pregnant women has decreased the transmission of hepatitis B virus [1].

Transmission

Hepatitis B virus is transmitted in ways that allow routine vaccination and universal screening of pregnant women to decrease its spread [1]. The virus can cause both acute and chronic viral hepatitis through person-to-person infectious routes [1].

Prevention

Routine vaccination of infants and universal screening of pregnant women have reduced hepatitis B virus transmission [1]. Vaccination is recommended for all infants and for adults at increased risk of infection [1].

Coding Register
ICD-10
B16
ICD-11
1E50.1
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