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Influx of inflammatory cells in the lung. Mice were exposed to CS or air for 3 months and intranasally inoculated with NTHi or S. pneumoniae (S.p.). Numbers of total immune cells (A), macrophages (B) and neutrophils (C) were determined in BAL fluids 24 hours (NTHi) and 4 days (S.p.) postinoculation. Bars indicate significant differences of *p < 0.05 and **p < 0.01, n ≥ 5 per group.
