RSV Infection (IMAGE) University of Pennsylvania Caption RSV, labeled with GFP to glow green, infects a sample of lung tissue from a deceased donor. New research shows that the virus produces defective genomes that prompt the immune system to eliminate the pathogen. Credit University of Pennsylvania Usage Restrictions In context of reporting 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.