Slowing the Allergic March (image) University of Pennsylvania School of Medicine Caption Allergic inflammation in the mouse lung. Activated airway epithelial cells (green) and alternatively activated macrophages (red) are visualized by immuno-fluorescent staining of histologic sections. Credit Meera Nair, PhD Mark Siracusa, PhD and David Artis, PhD, Perelman School of Medicine, University of Pennsylvania Usage Restrictions None 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.