CD8A and chronic obstructive pulmonary disease: According to the box plots in Figure 2D, it is more visually shown that plasma cells, CD8+ T cells, activated mast cells, Eos, and neutrophils increase to varying degrees, while B memory cells, T helper cells, CD4+ T memory cells, activated NK cells, and macrophages decrease significantly when samples from patients with COPD were compared with those from the normal population.