The extent of protection afforded by pcDNA-F was 3/10, while the extent of protection afforded by pcDNA-F and pcDNA-cIL-18 was 5/10.

• 攻毒试验结果是：非免疫对照组10/10死亡，常规疫苗组10/10保护，pcDNA-F+pcDNA-cIL-18免疫组5/10保护， pcDNA-F免疫组3/10保护。