1. Dengue hemorrhagic fever (DHF) Dengue shock syndrome (DSS) Probable risk factors for DHF –the infecting virus’s strain/serotype –the age of the patient –the genetic background of the patient

2. The distribution of each blood group among patients with DF was similar to that among patients with DHF. O B AAB

3. (39.1)(24.3)(29.7)(6.7)(43.7)(20.0)(30.6)(5.6) (50)(25) (43.9)(19.5)(31.7)(4.8) (33.3)(11.1)(44.4)(11.1)(38.2)(22.4)(34.8)(4.4) (100)(19.0)(9.5)(38.9)(33.3) (35.7)(14.2)(42.8)(7.1)(37.0)(19.8)(34.4)(8.6) (38.6)(22.7)(31.8)(6.8)(40.5)(19.9)(32.4)(7.0) (%) (by IgM/IgG ELISA)

4. (N-acetyl-D-galactosamine) (D-galactose) Glycoconjugate Journal (1997) 14: 159-173.

5. A previous study of HLA and dengue-virus infection found that the infecting viral serotype influenced the strength of the association between specific HLA alleles and dengue- disease severity. Tissue Antigens 2002; 60:309–18. The results of the present study suggest that, when associated with a secondary infection, blood group AB may be a risk factor predisposing for severe dengue disease.