Columbia engineers bioengineer soft microfibers to improve T-cell production. (image) Columbia University School of Engineering and Applied Science Share Print E-Mail Caption Columbia biomedical engineers use soft fibers (red) to activate T cells (green), improving cellular immunotherapy. Credit Lance Kam/Columbia Engineering Usage Restrictions Please use the credit line: Lance Kam/Columbia Engineering Share Print E-Mail 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.