TNFRSF13C and infection: In this study we found that after a subcutaneous (s.c.)inoculation with WNV, BAFFR-/- mice succumbed to infection and had reduced and delayed WNV-specific Ab responses; all BAFFR-/- mice had higher viral titers in the serum, spleen and brain than wild-type (WT) mice and expanded numbers of newly formed T1 B cells.