P2RY10 and infection: In contrast to the situation in adult mice, expression of Ifn-λ and the Ifn stimulated gene (Isg)15 was similarly induced after infection in both, wild-type and TrifLps2/Lps2 suckling mice with Ifn-λ mRNA levels in uninfected animals below the detection limit (Figure S2 and 5C, left panel).