Abstract
Hepatitis B virus infection is the 10th leading cause of death around the world. Occult HBV infection (OBI) represents those with a viral load of < 104 IU/ml. Among permanent blood recipients, OBI appears to be the most common cause of posttransfusion hepatitis. Moreover, OBI may reduce hepatitis C virus (HCV) treatment responsiveness in people with chronic HCV infection, and OBI may become acutely reactivated when on immunosuppression or potentially contribute to chronic liver disease. Since most previous studies used either small sample sizes, diverse populations, or were cross-sectional in design, it is possible that using multiple techniques with varying sensitivity for HBV DNA measurement in the liver or serum will shed light on discrepancies in the impact of OBI in cases with chronic liver disease. The purpose of this research is to review many elements of OBI, such as its prevalence, the hepatitis B virus and host immune mechanisms, diagnostic procedures, clinical implications, therapy, and prevention strategies.
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