It is shown that, cot a given delay, the dynamical behavior of immune reaction systems depends sensitively on antigenic propagation coefficients, instead of the speed rate of antigenic elimination.

• 结果表明，对于给定时滞，免疫反应系统的动力学行为不敏感地依赖于抗体清除抗原速率，而敏感地依赖于抗原繁殖系数。