CXCR2 and acute respiratory distress syndrome: Given the previous findings indicating the CXCR2‐dependent recruitment of neutrophils in ARDS, we engineered HEK 293T cells with CXCR2 overexpression (CXCR2 293T) to mimic this chemotactic process.[7, 20] Then, we prepared azido‐functionalized biomimetic nanovesicles (CNV‐N3) from these cells through Ac4ManNAz‐mediated metabolic engineering.