Geert Leroux-Roel, MD, PhD, Full professor, Director of Center for Vaccinology, Ghent University and Ghent University Hospital Geert Leroux-Roel’s research interests are vaccinology, immunology, infectious diseases (HBV, HCV, influenza, malaria). He graduated as a medical doctor from Ghent University in 1976, and specialised in internal medicine, conducting doctoral research in immunology. A postdoctoral fellowship followed in the Scripps Research Institute in La Jolla, California, and one in the department of molecular biology at Ghent University, after which he was appointed professor of medicine and director of the laboratory of clinical pathology in 1989. Over the past 25 years, Geert and his team have been studying the human immune response to HBV and HCV. His combined interest for microbes and immunity has led to a growing involvement in clinical vaccine evaluation. During the past three decades, more than 150 clinical vaccine trials have been conducted in the Center for Vaccinology (CEVAC). Numerous candidate vaccines (HAV, HBV, HSV, HPV, HIV, TB, malaria) and a series of new adjuvant systems have been clinically evaluated, some of which have been on the market for many years.