HLA-A and dengue disease: In addition, they found that HLA-A*33 was positively associated with DF versus HC (OR=2.12 and 95% CI=0.99-4.52) [14]. Vejbaesya et al. found in a Thai population that HLA-A*02 and HLA-A*01/03 had a positive association with secondary dengue infection (OR = 1.92 and 95% CI=1.30-2.83; OR=3.01 and 95% CI=1.01-8.92) [13].