FFAR4 and infection: At 2 days post-infection, GPR120 KO mice that received CBM 588 (CBM 588 (GPR120 KO) group) showed significantly higher virus titer in the lungs and significantly lower IFN-λ2,3 expression level in BALF, compared with the wild-type BALB/c mice that received the same CBM 588 dose (CBM 588 group) (Figures 3B and 3C).