Inclusion Criteria:  All individuals diagnosed with chronic hepatitis B in the participating study sites are eligible to be included (both newly diagnosed cases and those diagnosed in the past). 16 years of age or older. Attended the health service for HBV care within the prior 12 months from study commencement (retrospective recruitment) OR Attending the health service for HBV care from study commencement (prospective recruitment)  Exclusion Criteria:  1. Nil