T Lymphocyte (IMAGE) University of California - San Diego Caption A colored scanning electron micrograph of a human T lymphocyte is shown. Credit National Institute of Allergy and Infectious Disease Usage Restrictions Must credit National Institute of Allergy and Infectious Disease License Licensed 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.