CCL2 and lymphopenia: Several studies have reported cellular and molecular changes related to immunity include lymphopenia, neutrophilia, inflammatory cytokines, IL‐6, TNF‐α granulocyte colony‐stimulating factor (G‐CSF) and monocyte chemoattractant protein‐1 (MCP1) in severe COVID‐19 patients.40, 41, 42, 43