Fig. 4

Airway hyperresponsiveness (AHR). AHR was assessed by measuring the lung resistance (LR) to increasing doses of methacholine. Graphs are represented as the mean ± sem. Data are representative of two independent experiments performed on 6 animals per group. **, p < 0.01, ***, p < 0.001, shown comparing the control group with the other groups; #, p < 0.05, ###, p < 0.001, shown comparing the RSV + LPS group with the LPS group; ^, p < 0.05, ^^^, p < 0.001, shown comparing the RSV + LPS group with the RSV group