Fig. 2

A IG number in G/L in peripheral blood at Intensive care unit admission in COVID-19 patients without bacterial co-infection (blue, N = 17) vs patients with bacterial co-infection (red, N = 2). B IG number in G/L in peripheral blood on day 7 (± 2) in patients without VAP (blue, N = 7) vs patients with VAP (red, N = 10). The dot line represents the threshold separating patients with or without VAP. C IG number in G/L in peripheral blood on day 15 (± 2) in patients without VAP (blue, N = 3) vs patients that had VAP (red, N = 5). D Neutrophil to lymphocyte ratio (NLR) on day 7 (± 2) in patients without VAP (blue, N = 7) vs patients with VAP (red, N = 10). E CD4 lymphocyte absolute number in cell/µL on day 7 (± 2) in patients without VAP (blue, N = 7) vs patients with VAP (red, N = 10). F CD8 lymphocyte absolute number in cell/µL at day 7 (± 2) in patients without VAP (blue, N = 7) vs patients with VAP (red, N = 10). G HLA-DR expression on monocytes represented in antibodies bound per cell (Ab/c) on day 7 (± 2) in patients without VAP (blue, N = 7) vs patients with VAP (red, N = 10). Results from A to G are represented in boxes (mean and interquartile range) and whiskers (min to max range); circles represent individual values. p values were calculated using the Mann–Whitney test comparison