CD27 and infection: As expected no major alteration in the composition of pre-immune and infection-induced early myeloid subsets was recorded in the absence of IFN-γ signaling for “CD27+ CMPs” (39.3±12.3% of LIN−c-Kit+CD27+ cells) or “GMPs” (34.3±13.0% of LIN−c-Kit+CD27+ cells) (Figure 4A).