Artist's Rendition of Immune System (IMAGE) University of Chicago Medical Center Caption This is an artist's rendition of how an infection induces a plant to prime its immune system and thereby improve its resistance to future infections. Credit Illustration by Oak Ridge National Laboratory Usage Restrictions Journalists may use this illustration only in connevction with this news story. 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.