RecruitingPhase 1Biological interventionA Study of XB628 in Participants With Recurrent Advanced or Metastatic Solid TumorsThis is a phase 1, first-in-human, open-label, dose-escalation study of XB628, a first-in-class bispecific antibody natural killer (NK) cell engager that targets NK group 2 member A (NKG2A), an inhibitory receptor on NK cells, and programmed cell death-ligand 1 (PD-L1).