人类自古就与疾病进行斗争 ,从而形成了医学。疾病的发生与流行是经常出现的。据历史记载 ,世界性鼠疫 (Plague)大流行有 3次 ,首次发生于 6世纪东罗马帝国汝斯丁皇朝 ,医学史上称“游西弟安娜瘟疫”,在许多国家持续流行 50余年 ,死亡近亿人 ;第二次发生于 1 4世纪 ,称“黑死病 Humans have struggled with disease since ancient times, thus forming medicine. Occurrence and prevalence of diseases are frequent. According to historical records, the world plague (Plague) pandemic has three times, first occurred in the 6th century, the Roman Empire of East Timor dynasty, the history of medicine called “travel brother Anna Plague”, continued in many countries for more than 50 years, killing nearly 100 million people The second occurred in the 14th century, saying “Black Death.”