CCL2 and COVID-19: Furthermore, several multi-omics analyses of bronchoalveolar lavage fluid (BALF) from COVID-19 patients revealed chemokine-rich signatures including the expression of CCL2, CCL3, CCL4, CCL7, CCL8, CXCL2, CXCL8, CXCL17, and IP-10 (Bost et al., 2020; Xiong et al., 2020; Zhou Z. et al., 2020).