Yun Sang Cho is a Director of the Viral Diseases Division in the Animal and Plant Quarantine Agency in the Republic of Korea, who got a Ph.D. degree in 2002 from Seoul National University. He has been working on research and development of honeybee disease control measures, especially diagnostic and preventive techniques. He is very interested in the development of prevention and diagnostic methods for honeybee infectious diseases, including parasitic and viral diseases. He is a member of The Apicultural Society of Korea and the Korean Society of Veterinary Science. He currently works on ticks and tick-borne diseases, kit development for diagnosis, and vaccine development.