That is, the gene introduced into the GM corn did not make allergic reactions worse in the people with corn allergy in this study, or cause allergic reactions in people not allergic to corn. The people allergic to corn were reacting to other compounds normally present in corn.
Nakajima, O., Teshimaa, R., Takagia, K., Okunukia, H., and Sawada, J. 2007. ELISA method for monitoring human serum IgE specific for Cry1Ab introduced into genetically modified corn. Regulatory Toxicology and Pharmacology 47 (1): 90-95.