Adoptive transfer is a research area in immunology and cell therapy that involves transferring immune cells, such as T cells, into a patient to treat diseases like cancer, autoimmune disorders, and infections. In adoptive transfer therapy, the immune cells are typically collected from the patient or a donor, activated or genetically modified in the laboratory, and then infused back into the patient. This can help boost the immune system's ability to target and eliminate diseased cells, leading to improved outcomes for patients. Adoptive transfer therapy has shown promise in treating various types of cancers and is being actively studied and developed in clinical trials.