SARS病毒的起源:现有的证据表明,SARS病毒首先出现于中国广东省,但它何时、如何出现,是否源于动物尚不清楚。种系发生研究表明,其与已知的动物和人冠状病毒都有较大的差异,因此了解SARS病毒起源有重要的意义。绝大多数新出现的病毒都是动物源性的,SARS是否为动物源性,将影响到防治SARS的策略。但发现可能的动物来源是 SARS virus origin: The available evidence shows that the SARS virus first appeared in Guangdong Province, China, but when and how it emerged from animals is unclear. Phylogenetic studies have shown that there is a big difference between it and known animal and human coronavirus, so understanding the origin of SARS virus is of great significance. The vast majority of emerging viruses are animal-derived and whether SARS is animal-derived will affect the strategy of SARS prevention and control. But it is possible to find animal origin