The CD64 index was from the MFI of CD64 on N and L. We found that the levels of the CD64 index both in the non-sepsis group and in the sepsis group were significantly higher than that in the control group, but there were no differences between the non-sepsis and sepsis groups (P = 0.0012, P = 0.0005 and P > 0.9999 respectively; Fig. 2B). This evidence concerns the gene FCGR1A and Sepsis.