HLA-B and influenza: In about 70% of patients, SAT was associated with the HLA-B-35 allele.[17] Among the 8 patients who were reported to develop SAT after an influenza vaccine, only 3 underwent HLA testing and all the 3 patients showed HLA-B35 haplotype including one who was reported from our institution.[10-12] The influenza vaccine that was administered here was of a subunit, inactivated, trivalent nonadjuvanted type.[18] Hence, we suggest that the viral subunits were able to activate the immune system and cause SAT.