Zvimwe zviratidzo zvinoratidza kuti MS inobatanidzwa nehutachiona hwevanhu (HLA-allele) muzvikwata zve6 zvechromosome iyo inoshanda seyakanyanya kuwanda yeMultiple-cluster chromosome (MCC). Mukati memapatya akafanana, vese vanobatwa ne30% yenguva, nepo vanenge 5% yevasiri mapatya akafanana uye 2.5% yevanun'una vanobatwa nehuwandu hwehafu-vanun'una. Kana vabereki vose vari vaviri vanobatwa nenjodzi muvana vavo ndeye 10 nguva iyo yevanhu vose. MS inowanikwawo mune mamwe mapoka emarudzi kupfuura vamwe. Zvimwe zviratidzo zvakabatanidzwa neMS zvinosanganisira kusiyana kwevanhu muvanhu leukocyte antigen (HLA<unk>a gene system) yeboka re6 pa chromosome iyo inoshanda seyakanyanya kuwanda yevanun'una vake seMCC. Kubvira muna 1980 zvakawanikwa kuti huwandu hwehutachiona hwehutachiona hwevanhu hunowanikwa pakati peHLA-allele hunowedzera ne30% (HLA-allele) uye zvimwe zviratidzo zvakawanikwa zvakawanikwa kuti huwandu hwehutachi
HLA-C554