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[Abstract] Hepatitis B virus (HBV) mutants can lead to vaccine failure, diagnostic failure of HBV detection, increase viral replication and resistance to antiviral agents. To study the biological characteristics of these mutations may contribute to our knowledge on viral pathogenesis. Therefore, it is essential to isolate and characterize HBV strains from patients. Here we describe the experimental methods to isolate and clone HBV DNA from patient serum. The method will facilitate isolation and functional analysis of new HBV variants.

Characterization of HBV Isolates from Patient Serum Samples and Cloning