Category C - full version without watermark 720x576 (check terms and conditions at The embed version with watermark is free of charge - Description: Cancer cells are isolated and genetically modified in a way that they trigger an immune response of the patient. Once they are back in the blood, the immune system starts working and cancer is fought. One could virtually speak of a vaccination against the cancer. Another approach is to insert genes into the cancer cells that lead to self destruction (apoptosis). One should know that all cells are capable of inducing their own destruction. This happens for instance when the cell has been severely damaged by mutagens. In cancer cells this natural protective mechanism does not take place. They have lost the capability of inducing self destruction. Now genes are brought into the tumor tissue restoring this capability. The tumor dies off.