Astroviruses and Antibodies (IMAGE) University of California - Santa Cruz Caption Neutralizing antibodies bind to a structure known as the astrovirus capsid spike domain, which projects from the surface of astrovirus particles. By binding to the spike domain, the antibodies block the virus's ability to attach to and infect human cells. Credit Walter Bogdanoff Usage Restrictions For use only with news coverage of this research 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.