CCL2 and infection: Moreover, a higher level of IFNλ2/3 was observed on day 4, but not on day 7 post infection, while the expression of proinflammatory cytokines (TNF-α, CCL2, and CCL5) was similar in WT, ROSA-CLEC18A, and ROSA-CLEC18A(S339R) mice (Fig. 8f).