[Immunorepulsion]

Immunorepulsion is a local immunodepression which allows embryos, tumour cells, some bacteria and many parasites to survive and grow unharmed by the host immunological surveillance system. Such a local immunodepression results from the action of immunorepellents synthesized by some aggressors. These immunorepellents are able to prevent inflammatory reactions from occurring in the vicinity of the aggressors and to impede the leucocytes from fulfilling their functions.