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1. To check whether the patient’s symptoms are a result of an HBV infection. The doctor may need to perform a hepatitis B surface antigen (HBsAg) and hepatitis B core antibody IgM screening as part of the diagnosis. This can be performed with tests for hepatitis A (HAV) and hepatitis C (HCV), to determine which virus is responsible for the infection.
2. To observe and monitor the progress of chronic hepatitis B infection, and any treatment being administered.
3. To monitor for recurrence of the virus in patients with prior exposure.