Coronaviruses with spike proteins (IMAGE) University of Würzburg Caption Coronaviruses (round particles) with spike proteins (cyan) infect a host cell carrying sporadic ACE-2 receptors (pink). After membranes fuse and release viral components (purple). (violet) are released. Credit RVZ Würzburg Usage Restrictions no restrictions 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.