Visual analysis of t‐SNE maps confirmed the monocyte and lymphocyte dynamics associated with T2D and with COVID‐19 severity, notably a marked loss of CD14+ monocytes and CD8+ lymphocytes in T2D patients with severe COVID‐19, versus a specific loss of CD8+ lymphocytes in ND patients with severe COVID‐19 (Fig 4D). This evidence concerns the gene CD8A and type 2 diabetes mellitus.