FPR2 and infection: (B) WT BALB/c mice and AnxA1 KO mice or (C) WT C57BL/6 and FPR2 KO mice were pre-treated with Ac2-26 (i.p; 150 μg) 1 hr before infection with 1 × 106 PFU of DENV-2 via footpad injections (n = 5 for all groups, except for FPR2 KO mock, n = 4).