RIPK2 and leprosy: Four haplotypes and their frequencies were observed including AG, AA, GA and GG. The RIPK2 haplotype GA was observed more frequently in leprosy patients compared to controls inferring an increased risk of leprosy (OR = 1.46, 95% CI = 1.02–2.1, P = 0.036), whereas RIPK2 haplotype AA was observed less frequently in leprosy patients compared to controls inferring a protection against leprosy (OR = 0.69, 95% CI = 0.49–0.97, P = 0.028).