Minor alleles of two polymorphisms in the tumor necrosis factor (TNF) (rs1799964) and IL-6 (rs2069849) genes were associated with low rates of expression of measles-specific antibodies after the MMR vaccine in a Somali population [34], while polymorphisms in rs2228149 in IL-2 receptor subunit α (IL2RA) and rs1143634 in IL-1B have been associated with low rates of expression mumps-specific antibodies [34]. This evidence concerns the gene IL6 and measles.