CD45RO, CD8, CD8 T, CD8 T cells, E2, E5, E6, E6 proteins, E7 proteins, HPV, HPV E2, HPV-positive head and neck cancer, HPV-specific CD8 T cells, HPV-specific PD-1+ CD8 TILs, HPV-specific PD-1+ stem-like CD8 T cells, HPV-specific PD-1+TCF-1+ stem-like TILs, HPV-specific PD-1+TCF-1+CD45RO+ stem-like CD8 T cells, MHC, PD-1, PD-1+ stem-like CD8 T cells, Single, T cell receptor, T cells, TCF-1, TCF7, TILs, antigen-specific T cells, cancer1, effector-like cells, head and neck cancer, human, human papillomavirus (HPV)-positive, major histocompatibility complex, malignancy, patients, stem-like, terminally, terminally differentiated cells, terminally differentiated gene signature, tetramer-sorted, transitory, transitory cell population, tumour, virus, virus-specific CD8 T cells