TLR2 and infection: Inhalation of S. aureus resulted in a dose‐dependent influx of neutrophils into the airspaces of the lungs that was evident by 4 h after intermediate or high dose infection and persisted through 96 h of observation (Fig. 2; P < 0.005 intermediate versus high dose for both WT and TLR2−/−, at both 4 h and 24 h after infection).