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瘟疫灾害是急性传染病大规模流行造成的灾害,它自始至终是人类生命和健康安全的天敌。隋唐五代时期气候相对温暖,流行的疫病主要有天花、疟疾、痢疾等,与其前的魏晋南北朝和其后的宋元明清相比,该时期疫灾相对稀少,疫灾频度约12.4%,其中盛唐所在的8世纪疫灾频度最低;疫灾流行的季节主要是夏秋。至于疫灾的地理分布,隋朝是北方多于南方,唐朝与五代是南北基本平衡。北方疫灾主要发生在黄河中下游地区,南方疫灾主要发生在江淮之间和长江三角洲。
Plague Disasters are a disaster caused by the pandemic of an epidemic of infectious diseases and they are natural enemies of human life and health and safety from beginning to end. Sui, Tang and Five Dynasties climate is relatively warm, the prevalence of the epidemic are smallpox, malaria, dysentery, etc., compared with the previous Wei, Jin, Northern and Southern Dynasties and the subsequent Song, Yuan Ming and Qing Dynasties, relatively few epidemic, the frequency of the epidemic was about 12.4%, of which Tang Dynasty where the lowest frequency of the eighth century epidemic; epidemic epidemic season is mainly summer. As for the geographical distribution of the epidemic, the Sui Dynasty is more northern than the South, and the Tang and the Five Dynasties are the basic balance between North and South. Northern plague occurred mainly in the middle and lower reaches of the Yellow River, southern plague occurred mainly between the Jianghuai and the Yangtze River Delta.