RecruitingPhase 2Drug trialThe Efficacy of Camrelizumab Plus Stereotactic Body Radiotherapy in R/M NPCCamrelizumab is an antibody targeting programmed death receptor 1 (PD-1) and its ligand programmed death-ligand 1 (PD- L1) that is designed to boost the immune system. It does this by allowing immune cells to fight the cancer. Stereotactic body radiotherapy is a potential immunostimulatory therapy that may amplify antitumor response when combined with camrelizumab.