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。
C类病毒是欧洲主要类型。亚洲地区的香港,新加坡,韩国皆有此类型。且没有在中国大陆发现。
研究人员认为,A类毒株C类型演化自B,B类型演化自A。
研究人员采用的研究方法,此前主要被运用于通过研究DNA来追踪史前人类的人口流动。此次是首次运用在追踪新冠病毒的传播路径(“These techniques are mostly known for mapping the movements of prehistoric human populations through DNA. We think this is one of the first times they have been used to trace the infection routes of a coronavirus like COVID-19.” )
原文地址:https://www.cam.ac.uk/research/news/covid-19-genetic-network-analysis-provides-snapshot-of-pandemic-origins
论文今天发表在PNAS (美国科学院院刊),论文链接:https://www.pnas.org/content/early/2020/04/07/2004999117