SLURP1 and infection: By 14 days after infection, we observed large numbers of early lesions in C57BL/6 mice, but far fewer lesions in C3HeB/FeJ mice (Fig. 5, a and b; and Fig. S3 a), consistent with the increased MDM numbers observed at this time point in C57BL/6 in whole lungs (Fig. 2 a and Fig. 3 c).