HLA-A and dengue disease: In the Indian patients, increased frequencies of HLA-A*68 (2.4 fold rise, P = 0.658, 0R = 0.38, 95% CI = 0.09–1.65) were noted in DF patients as compared to controls (Table 3) while for DHF Indian patients, HLA-A*30 (6.3 fold rise, P = 0.113) and A*31 (3.9 fold rise, P = 0.266, 0R = 0.25, 95% CI = 0.02–2.82) alleles were observed to be increased in this population compared to healthy controls (Table 4).