TNFRSF1B and infection: In contrast, after 4 weeks of infection, TNFR2+ macrophages were reduced in memTNFΔ1–12 KI compared to wild-type and memTNFΔ1–9,K11E KI mice indicating a decreased signalling through TNFR2 which is considered to play an important role in memTNF activity (Fig. 7A, B).