An analysis of delayed action cell immunology tests involved 300 patients suffering from stomatological cancers. The tests used, tuberculine, candidine, varidase and DNCB have no particular value as far as discovering the size of the tumour, the quality of eradicating treatment or its progress. On the other hand, bias in the same direction and, even more, variations in the direction of immunity in the course of evolution seem to be a reflection of the patient's immune defence potential. This immune defence potential which can be roughly assessed in this way dose not seem to be reduced by chemotherapy or increased by immunotherapy, at least judging by the criteria used.
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