Condition: Non-Small-Cell Lung Carcinoma

The primary hypotheses are that coformulated pembrolizumab/vibostolimab is superior to pembrolizumab alone with respect to (1) overall survival (OS) in participants with programmed cell death 1 ligand 1 (PD-L1) tumor proportion score (TPS) ≥50%, TPS ≥1% and TPS 1% to 49%; and (2) progression-free survival (PFS) per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 by blinded independent central review (BICR), in participants with PD-L1 TPS ≥1% and TPS ≥50%.