MUC5AC and infection: MUC5AC protein levels in BAL on day 4 post-challenge were increased with RV infection alone (PBS + RV compared with PBS + UV; Supplementary Figure S2f) and were also increased in elastase/LPS + RV- compared with PBS + RV-treated mice on day 1 post-infection, but significantly decreased compared with elastase/LPS + UV treatment at the same time point (Supplementary Figure S2f).