Johan Sandberg, Karolinska Institutet (IMAGE) Karolinska Institutet Caption Johan Sandberg, professor of viral immunology at the Department of Medicine, Huddinge, Karolinska Institutet. Credit Photo: Stefan Zimmerman. 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.