PD-1 and LAG-3 are both inhibitory immune checkpoints known for limiting T cell activity in cancer. Blocking PD-1 and LAG-3 reprograms suppressive macrophages and sustains antitumor efficacy independently of T cells. Chinese researchers reported the development of BsPep-IMDQ, a bispecific peptide-drug conjugate (PDC) designed to target LAG-3 and PD-1 simultaneously.