While host genetic as well as viral virulence factors might contribute to severe DHF, viral load (infectious pressure) and concentration of antibody also appear to play a role.

• 宿主的遗传因素以及病毒毒力因素可能对发生严重DHF起作用,而病毒载量(感染压力)和抗体浓度似也有一定的作用。