CXCR3 is a chemokine receptor for three ligands: CXCL9, CXCL10, and CXCL11. Accumulating evidence, including data presented here, suggests that the interaction between CXCL9/CXCL10 and CXCR3 not only attracts CXCR3+ T cells but also promotes the induction of IFNγ-