Two <i>SLC11A1</i>-SNP1 genotypes were susceptible to tuberculosis, i.e., the heterozygote CG and the homozygote CC, while one <i>SLC11A1</i>-SNP1 genotype, i.e., the GG mutated homozygote, was less susceptible to infection. Here, SLC11A1 is linked to infection.