Deciphering the Sugar Code (IMAGE) University of Münster Caption Researchers discover vaccine to strengthen the immune system of plants. Credit Sruthi Sreekumar Usage Restrictions Only use this image in contzext of this press 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.