New vaccine ingredient shows promise (IMAGE) La Jolla Institute for Immunology Caption Scientists at La Jolla Institute for Immunology (LJI) and Massachusetts Institute of Technology (MIT), have found a possible way to improve the effectiveness of COVID-19 vaccines—and any vaccine. Credit NCI Usage Restrictions No restrictions. License Public Domain 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.