We note the differential expression of many inflammatory CC chemokines (CCLs) in severe COVID-19, including CCL2, CCL3, CCL8, CCL3L1 and CCL7, and CXC chemokines such as CXCL2 and CXCL8 (Supplementary Fig. 10d). The gene discussed is CXCL8; the disease is COVID-19.