Fig. 1

PD-1 expressing CD4⁺ and CD8⁺ T cells are increased in BA. A Dot plots showing frequencies of PD-1⁺CD4⁺ T cells in BA (n = 68) and control subjects (CC: > 4-month-old n = 17, ≤4-month-old n = 9; NHS: n = 7) . Horizontal lines indicate median values. Significance was determined by Mann-Whitney U test. B Dot plots showing frequencies of PD-1⁺CD8⁺ T cells in BA and control subjects. Horizontal lines indicate median values. Significance was determined by Mann-Whitney U test