Virus Networks (image) Georgia Institute of Technology Share Print E-Mail Caption Graph shows a cross-immunoreactivity network (CRN) composed of 100 viral variants. Altruistic variants are shown in green, persistent variants in red, and others in yellow. Credit Credit: Georgia Tech/CDC Usage Restrictions None Share Print E-Mail 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.