Triad of Cells (IMAGE) Memorial Sloan Kettering Cancer Center Caption A ’triad’ made of a killer T cell (red), helper t cell (green), and dendritic cell (yellow) unite to form a strong fighting force against cancer cells. Credit Memorial Sloan Kettering Cancer Center Usage Restrictions Attribution License Original content 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.