Abstract
GogeumGyeongheomHwalyubang [古今經驗活幼方] is a medical book dedicated to Smallpox, written by YU Sang [柳瑺] in the Joseon Dynasty (late 17th century to the early 18th century). As a smallpox specialist for the Joseon royal family, YU Sang was well-reputed after successfully treating smallpox of three of the 27 Joseon kings. There are four features of this book. First, the causes for smallpox are roughly recorded. Second, YU Sang emphasized the distinction between patients who could or could not be cured. Third, the herbs related to the treatment of smallpox are selected and organized separately. Fourth, YU Sang discusses the contents of diverse medical books and his own experiences. Conclusion : YU Sang's significant knowledge of smallpox treatment is well presented in his book, GogeumGyeongheomHwalyubang and this wealth of experience would have an important role in understanding the development of smallpox treatment in the late Joseon Dynasty.
