Lung Tissue Targeted (IMAGE) Arizona State University Caption Antigen staining of lung tissue reveals H5N1’s targeting of type II pneumocytes throughout the 7 day course of infection. The inset shows one of the 1918 ressortant strains targeting type I pneumocytes. Credit PNAS Usage Restrictions Figure from PNAS open access online 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.