Jann Hau is Professor of Comparative Medicine at the University of Uppsala in Sweden. Dr.Hau graduated in experimental biology from the University of Odense in Denmark after medical and biology studies in 1977 and specialized in laboratory animal science. Following research fellowships at the University of Odense, he obtained his doctorate (Dr. Med.) at this university. In 1983, he joined the Department of Pathology at The Royal Veterinary and Agricultural University (RVAU) in Copenhagen as associate professor and head of the Laboratory Animal Science Unit. He was later head of the Department of Pathology and dean of the Faculty of Animal Husbandry and Veterinary Science at the RVAU. In 1991, he moved to the Royal Veterinary College (RVC) in London as professor in the London University Chair in Laboratory Animal Science and Welfare. At the RVC, he was responsible for undergraduate and postgraduate teaching in laboratory animal science and welfare, which included a specialist Master of Science course in laboratory animal science that attracted a number of postgraduate students from many parts of the world. In 1996, Dr. Hau was appointed professor in Comparative Medicine in Uppsala. In Uppsala, he has established a number of courses for undergraduate and postgraduate students, including specialist education programs. In 2004, Dr. Hau took up a chair in Comparative Medicine and also heads the Department of Experimental Medicine at the University of Copenhagen in Denmark. Dr. Hau has organized several international meetings and courses on laboratory animal science. He is the editor-in-chief of the Scandinavian Journal of Laboratory Animal Science, editor of the laboratory animals’ section of the UFAW journal Animal Welfare, and a member of the editorial board of In Vivo. He is a member of a number of laboratory animal science organizations and former president of the Scandinavian Society of Laboratory Animal Science and the Federation of European Laboratory Animal Science Associations. Dr. Hau has supervised many postgraduate Master’s and Ph.D. students and published several hundred scientific papers and chapters in books. Together with Dr. P. Svendsen, he wrote the first Danish textbook on laboratory animals and animal experiments published in 1981, 1985, and 1989, and they co-edited the first edition of the CRC Handbook of Laboratory Animal Science, published in 1994. Dr. Hau’s current research interests include development of refined laboratory animal models for studies of biological mechanisms in reproductive biology and infections as well as development of methods to assess stress and welfare in animals, in particular rodents and nonhuman primates. His research activities also include projects focused on ways to replace, reduce, and refine the use of animals in antibody production.