VFLIP (IMAGE) La Jolla Institute for Immunology Caption VFLIP is a more stable, more accurate version of the SARS-CoV-2 "spike" protein. Credit Eduardo Olmedillas, Ph.D. Usage Restrictions none 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.