Exhausted T Cells (IMAGE) University of Würzburg Caption Healthy (red) and exhausted (green) T cells in the spleen of chronically infected mouse. Credit Ana Maria Mansilla / Institute for Systems Immunology, University of Würzburg Usage Restrictions none 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.