Figure 4. Analysis of baseline peripheral lymphocytes and NK cells in patients with or without the SARS-CoV-2 RNA test turning negative after therapy. (A) baseline peripheral lymphocytes and NK cells strikingly increased in patients whose SARS-CoV-2 RNA test turned negative after therapy. (B, C) ROC analysis of baseline peripheral NK cells (B) and lymphocytes (C) in differentiating patients whose SARS-CoV-2 RNA test turned negative after therapy.