IL6 and infectious disease: Altogether, a sensible explanation for the introgression at the GOLM1-NAA35 locus is that the GOLM1-NAA35 haplotype was historically introgressed from SCN pigs into LW pigs and then has been under preferential selection to improve the effective production of IL-6 in response to pathogens and consequently enhance the resistance to infectious disease of FLW pigs.