Rebooting the System (IMAGE) University of Pennsylvania School of Medicine Caption Immuno-fluorescence staining in mouse inflamed lung tissue showing activated airway epithelial cells (green), infiltrating macrophages (red) and cell nuclei (blue). Credit Image courtesy of Meera Nair, Laurel Monticelli and David Artis, Perelman School of Medicine, University of Pennsylvania 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.