T cells (IMAGE) Boston University Caption T cells, a type of white blood cell that defends the body from invaders, can be modified by scientists to attack cancer cells. Researchers at Boston University are developing a way to make this revolutionary cancer treatment safer for patients. Credit Photo by cgtoolbox/iStock. Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.