It is interesting to note that we did not observe the presence of granulomas in the lungs of the bone marrow chimaeras, suggesting that this influx of macrophages resulting in granuloma formation is mediated by a non‐haematopoietic component, possibly endothelial cells; Cyba is expressed by endothelial cells, and ROS can participate in vascular function 21. Here, CYBA is linked to Granuloma.