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世界鼠疫在经历了50～80年代的流行低谷之后,90年代以来,疫情表现异常活跃,报告疫情的国家增多,主要分布于非、美、亚三大洲的24个国家,报告病例数逐年直线上升,1990～1994年共计10127例。其中亚洲有中国、越南、缅甸、印度、蒙古及哈萨克斯坦等6国报告人间鼠疫疫情,报告的病例数占世界病例总数的近1/3O。国内鼠疫疫情与世界鼠疫形势一致,1990～1995年共发生人间鼠疫191例,是80年代发病总数的2.1倍,主要分布在云南、甘肃、青海、西藏、新疆及内蒙古等6省区。1996年全国人间鼠疫发病又创新高峰,成为近20～30年来发病最多的一年,而与广西相邻云南省则占全国发病总数的70％以上。
After experiencing the downturn in the 1950s and 1980s, the world plague has been exceptionally active since the 1990s and the number of countries reporting the outbreak has increased, mainly in 24 countries on three continents, including Africa, the United States and Asia. The number of reported cases rose linearly year after year , A total of 10,127 cases from 1990 to 1994. Among them, six plague outbreaks in China, Vietnam, Myanmar, India, Mongolia and Kazakhstan were reported in Asia, accounting for nearly one third of the total number of cases reported in the world. The domestic plague epidemic was in line with the world plague situation. There were 191 human plague cases in 1990-1995, which were 2.1 times of the total incidence in the 1980s. They were mainly distributed in 6 provinces including Yunnan, Gansu, Qinghai, Tibet, Xinjiang and Inner Mongolia. In 1996, the onset of human plague in the country reached a new peak and became the most frequently reported year in the past 20 to 30 years, while the Yunnan province adjacent to Guangxi Province accounted for more than 70% of the national total.