Dr. Michael Gale (IMAGE) UT Southwestern Medical Center Caption Dr. Michael Gale, associate professor of microbiology, has helped show that the hepatitis C virus turns on immune defenses upon entering the body but also can switch off those defenses by manipulating interaction of key cellular proteins. Credit UT Southwestern Medical Center 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.