IL1RN and Sepsis: Consistent with the observation of the increase in CXCR2+ and CD274+IL1RN+ neutrophil subpopulations in sepsis, the amplification of CXCR2+ and PD‐L1+ subpopulations was observed in both blood and BALF neutrophils in immunosuppressive sepsis patients (Figure 5C–F; Figure S4A–D, Supporting Information).