F2RL1 and influenza: Although we demonstrated a substantial role for MPO in influenza disruption (Figure 3(a)), application of a MPO inhibitor did not completely reverse the downregulation of intracellular IAV replication in PAR2 agonist-activated neutrophils (Figures 3(b) and 3(c)), suggesting the existence of a redundant mechanism(s) that are controlled by PAR2.