Stefan Kostense, PhD, Director Clinical Immunology, Crucell / Janssen Vaccines. After obtaining his PhD on HIV specific immunity, Stefan Kostense joined Crucell to build up the immunology department for the evaluation of vaccine immunogenicity. He has also created a Good Laboratory Practice and GCLP compliant laboratory for the analysis of toxicity and clinical samples. Stefan’s expertise comprises development, validation and transfer of antibody enzyme link assays, virus neutralisation assays, and T cell assays such as enzyme linked immuno spot assay and intracellular cytokine staining. As department head of Clinical Immunology he is responsible for clinical immunology strategy for clinical development of vaccines.