Rishi Mediratta, Johns Hopkins University (IMAGE) Johns Hopkins University Caption Rishi Mediratta, a junior public health studies major at Johns Hopkins University, and his faculty mentor, R. Bradley Sack, professor of international health and medicine at the Johns Hopkins Bloomberg School of Public Health. Credit Will Kirk/JHU 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.