The CAR-T cell therapy market is rapidly growing, with 11 products commercialized globally, including 7 FDA-approved in the U.S. CAR-T therapy modifies patient T-cells to target and kill cancer cells, showing promise in treating blood cancers. Challenges include treating solid tumors, reducing 'vein-to-vein' time, and reimbursement issues. The industry is advancing through gene-transfer techniques, partnerships, and exploring allogeneic therapies.