TSLP and infection: Another study showed that TSLP is required for the expansion and activation of virus‐specific effector CD8+ T cells in the lung during primary infection but concluded that this was due to an indirect effect based on TSLP‐induced IL‐15 production by CD11b+ inflammatory DCs, which in turn acts on CD8+ T cells, rather than from direct effects of TSLP on CD8+ T cells.