Before joining Wellcome in October 2013, Jeremy Farrar was director of the Oxford University Clinical Research Unit in Vietnam for 18 years. His research interests were infectious diseases, tropical health, and emerging infections. He has published over 500 peer-reviewed scientific papers, mentored many dozens of students and fellows, and served as chair on several advisory boards for governments and global organizations, including the World Health Organization. He was named 12th in Fortune's list of the World's 50 Greatest Leaders in 2015.