The epidemic situation of plague has been aggravated in recent 20 years both as an interpersonal and epizootic disease , and the world health organization has listed plague as a reemerging violent infectious disease .
近20年来鼠疫的动物与人间疫情有所加重,世界卫生组织已将其列为重新抬头的传染病。
An unprecedented epizootic avian influenza a ( h5n1 ) virus that was highly pathogenic has crossed the species barrier in asia to cause many human fatalities and posed an increasing pandemic threat .