CCL3 and COVID-19: Patients with severe COVID-19 show higher serum levels of C-reactive protein, D-dimer and proinflammatory cytokines including IL-6, IL-1β, TNF-α, IL-2, IL-8, IL-17, G-CSF, GM-CSF, IP10, MCP1, and MIP1α (or CCL3) named as cytokine storm [3,5,14].