Figure 2.

Altered relative and absolute numbers of main T cell subsets in patients with acute COVID-19 and COVID-19 convalescent patients. Scatters plots (A–C) and (D–F) showing the percentages (the percentage of T cell subset within total lymphocyte population) and absolute numbers (number of cells in 1 liter of peripheral blood, 10⁹/L) of T cells (CD3⁺), T-helpers (CD3⁺CD4⁺) and cytotoxic T cells (CD3⁺CD8⁺), respectively. Black circles—healthy control (HC, n = 24); black triangles—patients with acute COVID-19 (COV (fav), favorable outcome, n = 25); black squares—patients with acute COVID-19 (COV (unf), unfavorable outcome, n = 8); and white circles—COVID-19 survivors (CON, convalescent patients with favorable outcome of acute COVID-19, n = 33). Each dot represents individual subjects, and horizontal bars depict the group medians and quartile ranges (Med (Q25; Q75). Statistical analysis was performed with the Mann–Whitney U test.