Prions (IMAGE) Scuola Internazionale Superiore di Studi Avanzati Caption Prions Credit National Institute of Health: https://www.flickr.com/photos/nihgov/48440889002/in/photolist-Ndo19f-2gNydDq Usage Restrictions No restrictions. License Public Domain 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.