Bronchoalveolar lavage (BAL) at 72 h post-infection revealed an inflammatory expansion only in the MIF-sufficient animals (Fig. S2A), with an absence of eosinophils from Mif−/− airways (Fig. S2B) and fewer macrophages (Fig. S2C) with expression of RELMα only in wild-type mice (Fig. S2D). The gene discussed is MIF; the disease is infection.