CXCL8 and COVID-19: This assumption is supported by the finding of Deng et al., who observed increased concentrations of CXCL8, SCGF-β, and HGF in severe compared to non-severe SARS-CoV-2-infected patients.26 In particular, they found HGF discriminating severe vs. non-severe COVID-19 with 84% sensitivity and 98% specificity.