Influenza-infected aorta (IMAGE) RMIT University Caption An immunofluorescence microscopy image shows how activated immune cells (red) 'stick' to the inside of the aorta (green) during flu infection in pregnancy. Credit RMIT University Usage Restrictions Credit RMIT University 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.