Lung Cells (IMAGE) University of Vienna Caption This shows lung cells infected with influenza virus (stained green) and Legionella (stained red). The nucleus of the cell is stained blue. Credit Copyright: A. Jamieson Usage Restrictions The image may only be used with appropriate caption or credit 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.