SARS-CoV-2 Spike Protein (IMAGE) University of Iowa Health Care Caption Image shows a 3D print of a spike protein on the surface of SARS-CoV-2, the virus that causes COVID-19. University of Iowa and University of Georgia are developing vaccine candidates based on the PIV5 virus expressing coronavirus spike proteins. Credit NIH Usage Restrictions Image may be used for educational and informational purposes. Credit NIH 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.