It is also important to highlight the rates of homozygosity found in our T1D population, where 9.81% of the individuals with T1D were homozygous for DRB1*03, 5.89% for DRB1*04 and only 0.2% for DRB1*09, similar to a previous study in Brazil7. The gene discussed is HLA-DRB1; the disease is type 1 diabetes mellitus.