GPT and hepatitis A virus infection: As shown in Figure 3 and Table 3, HBV-specific T cells presented 0.742 AUC, 56.5 SFUs cut-off value, 75% specificity and 75.9% sensitivity for the liver function at the time point of HBV-specific T cells test, indicating that chronic HBV patients with HBV-specific T-cell reactivity less than 56.5 SFUs/4×105 PBMCs were more likely to develop hepatitis (ALT> 40).