the South Korea Keytruda Market Size is Anticipated to Reach USD 1236.95 Million by 2035, Growing at a CAGR of 5.8% from 2025 to 2035. The growing popularity of immunotherapy as a first-line treatment and the rising incidence of cancer, particularly stomach and lung cancers. Along with rising awareness of combination therapies and personalized medicine, government efforts to enhance oncology care and growing healthcare infrastructure also support market expansion.