Invent from the mankind vaccinal since sending virus of smallpox of antagonism of oneself immunity ability through stimulating, inject vaccine is exclusive the significant measure that can kill virus and bacterium at the same time.

• 自人类发明牛痘通过激发自身免疫能力对抗天花病毒以来，注射疫苗是唯一能同时杀死病毒和细菌的有效办法。