Xavier Bossuyt gained his medical qualification and PhD at the Catholic University of Leuven (Belgium). He spent two years at the department of Clinical Pharmacology and Toxicology of the University Hospital Zürich as a post-doctoral researcher. He was trained in clinical pathology at the University Hospitals Leuven and at the National Institutes of Health, Bethesda, USA.
He is a professor of medicine at the Catholic University of Leuven and a clinical laboratory immunologist at the Department of Laboratory Medicine at the University Hospitals Leuven. His research mainly focuses on protein chemistry, serologic markers in autoimmune diseases, the immune response to Streptococcus pneumoniae and immunodeficiencies.