Fruit Fly Closeup (IMAGE) NASA/Johnson Space Center Caption The fruit fly -- Drosophila melanogaster -- is helping researchers understand how spaceflight affects the immune system's response to infection. Credit NASA / Dominic Hart 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.