11. The antibodies are in balance, until an antigen disturbs the balance, stimulating an immune reaction . 12. They provoke none of the immune reactions in the body that result from other infections. 13. Experimentally induced immune reactions to gonad in rainbow trout ( " Salmo gairdneri " ). 14. One tissue is a dendritic cell, which is important in stimulating immune reactions in humans. 15. Another problem is that using artificial materials to support tissue can trigger an immune reaction . 16. Those methods require injection of a piece of virus to stimulate immune reactions from cells. 17. Concerns about adverse immune reactions are " not much of an issue, " he said. 18. His transplant subjects typically died due to immune reactions . 19. Contact with metals can cause immune reactions such as skin hives, eczema, redness and itching. 20. But only a few have a natural immune reaction that keeps the disease from coming back.
