CPS	combined positive score
CTLA-4	cytotoxic T-lymphocyte antigen 4
EBNA1	Epstein–Barr nuclear antigen 1
EBV	Epstein–Barr virus
EBV-GC	Epstein–Barr virus—gastric cancer
ECOG	Eastern Cooperative Oncology Group
GC	gastric cancer
HBV	hepatitis B virus
HCC	hepatocellular carcinoma
HCV	hepatitis C virus
HHV-8	human gammaherpesvirus 8
HIV	human immunodeficiency viruses
HPV	human papillomavirus
HTLV-1	human T-lymphotropic virus 1
ICIs	immune checkpoint inhibitors
LMP1	latent membrane protein 1
LMP2	latent membrane protein 2
NPC	nasopharyngeal carcinoma
MCPyV	Merkel cell polyomavirus
ORR	overall response rate
OS	overall survival
PD-1	programmed death 1
PDL-1	programmed death-ligand 1
PFS	progression free survival
R/M	recurrent/metastatic
TILs	tumour-infiltrating lymphocytes