多少年来,鼠疫、天花、霍乱、流感等传染病的猖撅流行都与旅游密切相关。历史上曾发生的事件至今让人们记忆犹新。 14世纪,一场鼠疫大流行给欧洲各国造成了极大的危害,2500万人死于鼠疫;15世纪哥伦布发现美洲新大陆,就在他们胜利返航时,却把梅毒也带入了欧洲,引起 For many years, epidemics such as plague, smallpox, cholera, flu and other infectious diseases have been closely linked with tourism. The events that have taken place in history have so far made people remember. In the 14th century, a plague epidemic caused great harm to all countries in Europe, killing 25 million people from the plague. In the 15th century, when Columbus discovered the New World of the Americas, it brought the syphilis to Europe when it returned to victory.