CXCL2 and COVID-19: Figure 4A showed that CXCL2 and TNF induce neutrophil, while IL1A, IL1B, IL6, CXCL1, and TNF induce the T-helper cell. Enhance concentration of IL1A, IL1B, IL6, and TNF cause increase body temperature via the hypothalamus in COVID-19 (Figure 4A).