Jonathan Kipnis (from left), James C. Cronk and Christopher C. Overall (image) University of Virginia Health System Share Print E-Mail Caption Jonathan Kipnis (from left), James C. Cronk and Christopher C. Overall, of the University of Virginia School of Medicine, have done what was thought impossible: find a way to get immune cells known as macrophages into the brain without the need for radiation. Credit Josh Barney | UVA Health System Usage Restrictions May be used to accompany news coverage of the brain discovery. All other uses require express written permission from UVA Health System. Share Print E-Mail 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.