S100A8 and infection: S100a8-Cre or Inhbafl/fl (hereafter referred to as “control” animals) and S100a8-Cre/Inhbafl/fl mice were intranasally infected with 50 pfu of A/PR/8/34 (H1N1) Influenza virus, and Inhba expression was assessed in FACS-sorted immune cells infiltrating the lung, 3 and 8 days post-infection (p.i.).