IFNγ serum evaluated over the course of Pneumocystis lung infection in IFNAR−/−, IFrag−/−, wildtype and RAG−/− mice at day 0, 7 10 and 16 post infection using a plate based ELISA assay. Figure 4A compares serum IFNγ responses between lymphocyte-competent IFNAR−/− and wildtype mice, Figure 4B compares serum IFNγ responses between lymphocyte-competent IFrag−/− and RAG−/− mice. Statistical analysis was performed using a 2-way ANOVA. Comparisons were made between groups at the same time point. P values are marked as * p< 0.05, ** p<0.01, *** p<0.001.