ABSTRACT
Oral vaccine can stimulate the immunity of intestinal mucosa effectively after entering the gastrointestinal orally. It is a more ideal way of immunity compared with the traditional injection vaccine, since oral vaccine delivery mode is simple and quick while the results of immunity is stable and durable. There are many types of oral vaccines, including live attenuated vaccine, DNA vaccine and transgenic plant vaccine. Oral vaccine vehicle has more types, which not only can enhance the body to absorb the antigen but also can enhance the immune effect of the protective antigen effectively. In this paper, the mechanism about immunologic effect and recent advance on the research progression of oral vaccine are reviewed, what would provide ideas for related basic research.