IL2 and injury: The above cytokines are inflammatory factors, and these cytokines can form enzymes through the release of astrocytes, increasing leukocyte infiltration and adhesion to vascular endothelial activity.11 In this study, the immune system stimulated by antigen of patients with brain injury can trigger immune system response, and the level of IL-2 in patients before treatment were significantly lower, while TNF-α, IL-6 and hs-CRP were significantly increased.