GSTM1 and leptospirosis: Between the healthy and leptospirosis groups, excluding the following Raman peaks: oxygenation status marker at 565 cm–1 (p = 0.09), Hb integrity conferring marker at 788 cm–1 (p = 1.00), phenylalanine and amide emanating peaks at 1,025 cm–1 (p = 0.32) and 1,049 cm–1 (p = 0.91), respectively, RBC membrane peak at 1,122 cm–1 (p = 1.00) and the pyrrole deformation peaks at 1,165 cm–1 (p = 1.00) and 1,175 cm–1 (p = 0.38), all other Raman peaks exhibited significant differences across the samples.