the immune response could not be ascribed to leakage of cells into either the external auditory meatus or the nasopharynx , ( ii ) immunization occurred at least partly via the regional lymphatics , ( iii ) single orthotopic or heterotopic incus grafts immunized their hosts sporadically , and ( iv ) the variable immunization which followed single ossicular grafts was due to their relatively low content of antigen .
C0301872
immune response
C0003320
antigen