CCL5 and COVID-19: While these data clearly show upregulations of several chemokines, the data for some chemokines like RANTES (Regulated on Activation, Normal T Expressed and Secreted, CCL-5) are less clear: while Zhao Qin et al. [31] demonstrated elevated serum levels in mild but not severe cases of COVID-19, Li et al. [32] described the opposite results.