article_snippet: New approach: Doctors remove white blood cells from a patient and equip white blood cells with a chemical target found in the tumor.
article_snippet: Then white blood cells return white blood cells to the patient's body, where white blood cells train the immune system to go after the cancer cells and kill the cancer cells. '
article_snippet: Doctors remove white blood cells from a patient and equip white blood cells with a chemical target found in the tumor called cytomegalovirus, or CMV.  
article_snippet: Then Doctors return white blood cells to the patient's body, where Doctors train the immune system to go after white blood cells and kill white blood cells.