Table 3.

Flow cytometric analysis of lymphocyte populations in bronchoalveolar lavage fluids from patients with COVID-19.

Lymphocyte subsets (n = 14)	Range (median)
T cells	69–94% (86.5%)
B cells	0–2% (0.9%)
NK cells	3–20% (9.9%).
CD4:CD8 ratio	0.3–2.5 (1.4).
Expression of activation markers in T cells (n = 9)	Positive/total cases (%); range of % positive T cell (median)
CD38+	9/9 (100%); 37–75% (64%)
HLADR+	8/9 (89%); 40–64% (52.8%)
CD25+	7/9 (78%); 30–60% (37.8%)