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The correlation between serum HBsAg levels and HBsAg expression in hepatocytes along the phases of HBV infection. Immune-tolerant phase: HBeAg(+), FS <6, and HBV DNA >106 copies/mL (A). Immune-clearance phase: HBeAg(+), FS > 6, and HBV DNA between 103 and 106 copies/mL (B). Inactive phase: HBeAg(−), FS >6, and HBV DNA <103 copies/mL (C). Recovery phase: HBeAg(−), FS >9.4, and HBV DNA >103 copies/mL (D).
