Lymphokine-Activated Killer Cells, or LAK Cells, are a method of taking lymphocytes and culturing them outside the body, then stimulating them with IL-2. After this, the cells transform into Lymphokine-Activated Killer Cells (LAK Cells), which are important for the immune system’s response, controlling the proliferation and function of T-cells, thereby enhancing the immune system’s ability to deal with cancer cells. Therefore, LAK Cells are used to treat certain types of cancer and to stimulate the increase of T-cells in patients’ bodies in cases where T-cell levels are below standard. When these cells are stimulated through laboratory processes and injected back into the patient’s body in subsequent treatment steps, LAK Cells are often used in conjunction with other treatments to increase efficacy, such as using LAK Cells in conjunction with cancer vaccines, for example, Cancer Vaccine (WT1-DC).