CXCR3 and COVID-19: In particular, increased expression of CXCR3-binding chemokines was found in bronchoalveolar lavage (BAL) and peripheral blood mononuclear cells (PBMC) of patients with severe COVID-19, while CXCR3-bearing neutrophils were found in pulmonary tissue in COVID-19 (Rossi and Zlotnik 2000), but not in healthy individuals (Hartl et al., 2008).