Professor Yaowalark Sukthana, M.D., Dean of the Faculty of Tropical Medicine, Mahidol University together with Associate Professor Pornthep Chanthavanich, M.D., Assistant Professor Weerapong Phumratanaprapin, M.D. and Dr. Watcharapong Piyaphanee, M.D. welcomed Professor Davidson Hammer, Project director of GeoSentinel Network and Dr. Douglas H. Esposito from Global migration and Quarantine, US CDC in the occasion of visiting Travel Medicine Clinic, Faculty of Tropical Medicine, Mahidol University, as the GeoSentinel Site of Thailand.  GeoSentinel is a global network of travel medicine in cooperation of International Society of Travel Medicine and US CDC that related to travel-associated diseases mostly in international travelers.  This activity was held at Dean’s Office, Faculty of Tropical Medicine, Mahidol University.