HLA-B and psoriasis: Researchers have linked streptococcal throat infections to psoriasis through genetic association studies, suggesting the recognized psoriasis risk allele HLA-C*06:02 as a risk factor for streptococcal tonsillitis and the imputed psoriasis risk haplotype HLA-C*06:02/HLA-B*57:01 as the strongest risk for tonsillitis [51, 52].