A mouse lymph node (IMAGE) Rockefeller University Caption A mouse lymph node, containing B cells and T cells. Credit Laboratory of Molecular Immunology Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.