Lucien Karhausen graduated in medicine, from Brussels' Free University. he subsequently trained for five years in internal medicine at Memorial Hospital, Cornell Medical school in New York. Furthermore, he took a master's degree in epidemiology from the Harvard School of Public Health. Back in Belgium, he organized a a course on epidemiology for WHO's European Office . He was engaged by the European Commission in a radiation protection programme and became involved in the development of European medical research. He wrote several books in French on philosophical aspects of medicine.