文章按某种方法给不同病毒样本排了个辈分,讨论辈分关系,没有讨论起源,但是有明显暗示武汉不是起源地的意味,即“B类毒株是中国境内(即武汉)主要类型,且并没有传播出东亚地区”。 While the ancestral B type is monopolized (26/26 genomes) by East Asians, every single (19/19) B-type genome outside of Asia has evolved mutations. This phenomenon does not appear to be due to the month-long time lag and concomitant mutation rate acting on the viral genome before it spread outside of China.