(a) Ifnk expression and (b) body weight after 8 days of IMQ or vehicle treatment. (c) Representative photographs of ears from treated and untreated male and female mice. (d) Change in ear thickness was assessed. n = 12‒20 mice per group. * P < 0.05, ** P < 0.01, **** P < 0.0001. (e) Representative images of spleens from IMQ-treated and control mice. (f) Spleen weight quantitation. n = 12‒20 mice per group. Statistical significance levels are indicated as *** P < 0.001 and **** P < 0.0001. IMQ, imiquimod; KO, knockout; TG, transgenic; Tx, treatment; WT, wild type.