HBsAg level defines different clinical phenotypes of HBeAg(-) chronic HBV infection related to HBV polymerase-specific CD8⁺ cell response quality.

Furthermore, in 22 HLA-A2 + cases, we observed an almost significantly faster decrease in HBsAg level in those cases with HBVpol 455-63 -specific CD8 + T cells with preserved expansion ability with respect to those without reactive cells [16.2% (IQR 29.6) vs. 8.9% (IQR 9.14)] ( Figure 5C ). 4 Discussion In a previous large longitudinal study that followed up a cohort of HBeAg-negative chronic HBV infection for 13 years, 2% of subjects per year of follow-up developed HBeAg(−) chronic hepatitis B.

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