IL25 and helminthiasis: On the other hand, iILC2s express high levels of KLRG1 (a C-type lectin receptor) and IL-17RB (an IL-25 receptor component), and expand and transiently appear after helminth infection and recombinant IL-25 administration (Huang et al., 2015; Huang et al., 2018; Ricardo-Gonzalez et al., 2020).