Mark Loeb, McMaster University (IMAGE) McMaster University Caption Mark Loeb is a professor of pathology and molecular medicine at McMaster University and the infectious disease head of service for Hamilton Health Sciences. Credit McMaster University 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.