CCL2 and COVID-19: In this severe form of COVID-19 there is excessive release of proinflammatory cytokines such as interleukin (IL)-1β, IL-2, IL-6, IL-7, tumor necrosis factor (TNF)-α, interferon-γ inducible protein 10, granulocyte colony stimulating factor, monocyte chemoattractant protein 1 and macrophage inflammatory protein 1-α, characterized as a “cytokine storm” syndrome [1].