IFNAR1 and anemia (phenotype): This correlated with higher anemia in type I IFN-deficient animals 4 days after the antibody infusion (Figure 1C, p = 0.0286, compared to the WT 129/Sv counterparts) and was prevented with a blockade of IFN-γ signaling in IFNAR KO mice (Figure 1D, p = 0.0286).