Chongqing Key Laboratory for Research of Infectious Diseases 1 article published in JoVE Immunology and Infection Analysis of HBV-Specific CD4 T-cell Responses and Identification of HLA-DR-Restricted CD4 T-Cell Epitopes Based on a Peptide Matrix Jianmei Xiao1,2, Xing Wan1,2, Haoliang Wang1,2, Guohong Deng1,2 1Department of Infectious Diseases, Southwest Hospital, Third Military Medical University (Army Medial University), 2Chongqing Key Laboratory for Research of Infectious Diseases Based on a hepatitis B virus (HBV)-derived peptide matrix, HBV-specific CD4 T-cell responses could be evaluated in parallel with identification of HBV-specific CD4 T-cell epitopes.