Suppressive factors were found to be present in serum and considered to be one of the causes of the suppression of body defenses following thermal injury stress. The purpose of our previous study was to find out any abnormality of the postburn stress serum proteins by the comparison of burned and normal sera using immunoprecipitation in gel. The results of SDSpolyacrylamide gel electrophoresis, crossed immunoelectro Suppressive factors found found to be present in serum and considered to be one one of the causes of the suppression of body defenses following thermal injury stress. The purpose of our previous study was to find out any abnormality of the postburn stress serum proteins by the comparison of burned and normal sera using immunoprecipitation in gel. The results of SDS polyacrylamide gel electrophoresis, crossed immunoelectro