Incubated pathogenic factors are characterized by dynamic changing

Timeliness

spatiality

selfaccumulation and with special syndrome but without symptoms.This theory stems from Yellow Emperor’s Inner Canon（黄帝内经）

lays foundation in Han

Jin

Tang and Song Dynasties

grows up in Ming and Qing Dynasties

and becomes complete through the development of modern physicians.It is now widely used to direct the diagnosis and treatment of internal injury and miscellaneous diseases.In the view of preventive treatment of diseases

early prevention and treatment epidemic febrile disease occurring after incubation could greatly broaden the field of vision in Chinese medicine clinical diagnosis and treatment.