The mean mRNA expression ratios of VDR/GAPDH are identified to be significantly lower in TT/BT and BL/LL group of leprosy in comparison to the HC (TT/BT vs. HC, 0.702 vs. 1.076 and BL/LL vs HC, 0.462 vs 1.076 p < 0.05) (Fig 2). The gene discussed is GAPDH; the disease is leprosy.