Greg Ebel, Colorado State University (IMAGE) Colorado State University Caption CSU's Greg Ebel said he thought that the viruses would either compete or enhance each other in some way, but that wasn't the case. Credit John Eisele/CSU Photography Usage Restrictions None 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.