US Patent 11359021 PD-L1 antibody, antigen-binding fragment thereof, and pharmaceutical use thereof

A novel PD-L1 antibody, an antigen-binding fragment thereof, and a pharmaceutical use thereof. A humanized antibody comprising a CDR of the PD-L1 antibody, a pharmaceutical composition comprising the PD-L1 antibody and the antigen-binding fragment thereof and a use of the PD-L1 antibody as a drug. A use of a humanized PD-L1 antibody in preparing a drug for treating diseases or disorders associated with PD-L1.