Fig. 4

Inflammatory cell numbers in BAL fluid of mice exposed to CuO NPs in aerosols. a Neutrophils, b Macrophages, c Lymphocytes, and d Eosinophils (Red-highlighted area indicated time during CuO exposure). Statistical analysis was performed using Kruskal–Wallis test. Data are expressed as mean ± SD (n = 5). *** P < 0.001, **P < 0.01, *P < 0.05