The survival and intestinal injury of the mice were then assessed, and the results showed that, compared with that of the NEC+PBS control group, the NEC+rCCL3 group had slower or decreased weight gain (Figure 2A), increased mortality (Figure 2B), and more severe gross intestinal flatulence and bleeding (Figure 2C), whereas anti-CCL3 significantly reversed the rCCL3-mediated severe intestinal injury and death (Figures 2A–C). The gene discussed is CCL3; the disease is necrotizing enterocolitis.