HLA-DRB1 and leprosy: The present study is in accord with these results: HLA-DRB1*DR9 was associated with susceptibility to Borderline leprosy and HLA-DRB1*04 was associated with protection against LL leprosy, as a lower frequency was observed in these patients compared to in the TT group, and DQB1*03 showed a tendency towards protection.