Delayed Reaction (IMAGE) Rockefeller University Caption Luciano Marraffini and Wenyan Jiang investigate how bacteria fight off viruses. Credit Laboratory of Bacteriology at The Rockefeller University, photo by Zach Veilleux Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.