Although there was no direct link observed between polymorphisms in FCN3 and leprosy, H-ficolin levels were higher in patients with the FCN3 +4473C>A ∗2B1 haplotype, in addition to being higher in the leprosy and lepromatous patient's comparative to controls [107], indicating that elevated H-ficolin levels may help propagate the disease. Here, FCN3 is linked to leprosy.