Bangladeshi preschool children with multiple Cryptosporidium infections (≥2 infections) were more likely to carry the -221 MBL2 promoter variant (rs7906206; odds ratio [OR] = 4.02, P = 0.025) and to have the YO/XA haplotype (OR = 4.91), as well as to be deficient in their MBL serum levels (OR = 10.45) (14). This evidence concerns the gene MBL2 and infection.