ck303CK-303: CAIXADCCCheckpoint Therapeutics, Inc. (Checkpoint Therapeutics, Inc.)Pipe; Cosibelimab; Olafertinib; CK-103; CK-302; CK-303; Cosibelimab: An Anti-PD-L1 Antibody. Cosibelimab (CK-301) is a human immunoglobulin G1 (G1) monoclonal antibody