ALT, alanine aminotransferase; APC, allophycocyanin; Arm, Armstrong strain; BTLA, B and T lymphocyte attenuator; CFSE, carboxyfluorescein diacetate succinimidyl ester; CTL, cytotoxic T lymphocyte; Chronic Infection; ELISA, enzyme-linked immunoassay; FACS, fluorescence-activated cell sorter; FoxP3, forkhead box P3; GP, glycoprotein; HBV, hepatitis B virus; HCV, hepatitis C virus; Hepatitis; IFN, interferon; IL, interleukin; IP, intraperitoneal; IV, intravenous; LCMV, lymphocytic choriomeningitis virus; LIL, liver-infiltrating lymphocytes; NP, nucleoprotein; P14, GP33­41-specific TCR transgenic; PD-1, programmed death-1; PD-L1, programmed death-ligand-1; PE, phycoerythrin; RAG, recombination-activating gene; TCR, T-cell receptor; TNF-α, tumor necrosis factor-α; TNP4, NP396­404-specific TCR transgenic; TTR, transthyretin; Tolerance; Treg, regulatory T cell; pfu, plaque-forming units