Physiologically relevant levels of recombinant Ym1 observed in the BAL during N. brasiliensis infection (S2e Fig) and lung inflammation [42], was delivered to IL-4Rα-deficient animals at the time when repair in wild-type mice would usually occur (days 4 and 5) and responses were examined at day 6 post-infection (Fig 6a). The gene discussed is IL4R; the disease is infection.