IL2 and infection: However, deletion of the common IL-2/7 gamma chain (γc) on the NOD.SCID background rendered mice highly susceptible to infection at the pre-patent adult stage (73% median recovery, 4/4 mice infected, p < 0.01 when comparing NOD.SCIDγc−/− and CB.17 SCID mice, Kruskal–Wallis with Dunn’s post-hoc test, Fig. 1a).