Vaccine

Patent Pending PROBLEM TO BE SOLVED: To provide an intestinal tract immunity induction type vaccine capable of inexpensively and efficiently inducing intestinal tract immunity. ; SOLUTION: The intestinal tract immunity induction type vaccine comprises bacteriophage infected by an intestinal tract contagium. In the vaccine, an antigen protein derived from the intestinal tract contagium is exhibited on the surface of head shell of the bacteriophage.