Graphic representation (IMAGE) University of Queensland Caption A graphic representation of how a discovered compound inhibits the COVID-19 virus main protease. Credit Professor Luke Guddat Usage Restrictions Only to be used with this story. Must be credited. 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.