CSF2 and infection: The reduction in CIITA expression also occurs in human (GM‐CSF + IL‐4) Mo‐DCs and murine GM‐CSF‐cultured BMDCs in steady‐state, and upon LPS, TNFα, CD40L and IFNα stimulation, as well as infection with Salmonella typhimurium and Sendai virus.53, 83