报告指出，新冠病毒分三个变种：A、B、C。A类病毒更多发现于美国和澳洲的受感染者。A类在武汉只有极少案例，且来源于在武汉生活过的美国人。A类和从蝙蝠、穿山甲身上提取的病毒最为相似。研究人员称A类病毒为“爆发根源”（ “the root of the outbreak” ）。
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，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.” ）
Variant ‘A’, most closely related to the virus found in both bats and pangolins, is described as “the root of the outbreak” by researchers. Type ‘B’ is derived from ‘A’, separated by two mutations, then ‘C’ is in turn a “daughter” of ‘B’.
There are two subclusters of A which are distinguished by the synonymous mutation T29095C. In the T-allele subcluster, four Chinese individuals (from the southern coastal Chinese province of Guangdong) carry the ancestral genome, while three Japanese and two American patients differ from it by a number of mutations.
There are two subclusters of A which are distinguished by the synonymous mutation T29095C. In the T-allele subcluster, four Chinese individuals (from the southern coastal Chinese province of Guangdong) carry the ancestral genome, while three Japanese and two American patients differ from it by a number of mutations. These American patients are reported to have had a history of residence in the presumed source of the outbreak in Wuhan. The C-allele subcluster sports relatively long mutational branches and includes five individuals from Wuhan, two of which are represented in the ancestral node, and eight other East Asians from China and adjacent countries. It is noteworthy that nearly half (15/33) of the types in this subcluster, however, are found outside East Asia, mainly in the United States and Australia.
看看你引的Dr Collins的一段：A new study debunks such claims by providing scientific evidence that this novel coronavirus arose naturally. 能看懂不？不是人造的！其实Collins写此文的目的就是要说他支持一组他了解的世界级科学家的研究结果，即新冠病毒不可能是人造的。苯啊。
Forster and colleagues found that the closest type of COVID-19 to the one discovered in bats – type ‘A’, the “original human virus genome” – was present in Wuhan, but surprisingly was not the city’s predominant virus type.
Versions of ‘A’ were seen in Chinese individuals, and Americans reported to have lived in Wuhan, and mutated versions of ‘A’ were found in patients from the USA and Australia.
Wuhan’s major virus type, ‘B’, was prevalent in patients from across East Asia. However, the variant didn’t travel much beyond the region without further mutations – implying a 'founder event' in Wuhan, or 'resistance' against this type of COVID-19 outside East Asia, say researchers.
。。。
Variant ‘A’, most closely related to the virus found in both bats and pangolins, is described as 'the root of the outbreak' by researchers. Type ‘B’ is derived from ‘A’, separated by two mutations, then ‘C’ is in turn a “daughter” of ‘B’.
Versions of ‘A’ were seen in Chinese individuals, and Americans reported to have lived in Wuhan, and mutated versions of ‘A’ were found in patients from the USA and Australia.
剑桥大学昨天发表论文，认为新冠病毒A类是病毒爆发的根源，而A类集中出现在美国和澳洲，出现于武汉的病毒属于B类，是从A类变异而来。
这篇论文发表于美国科学院院刊。
剑桥大学发表关于新冠病毒的几个变种和传播路径的研究报告。
报告指出，新冠病毒分三个变种：A、B、C。A类病毒更多发现于美国和澳洲的受感染者。A类在武汉只有极少案例，且来源于在武汉生活过的美国人。A类和从蝙蝠、穿山甲身上提取的病毒最为相似。研究人员称A类病毒为“爆发根源”（ “the root of the outbreak” ）。
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，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
https://weitoutiao.zjurl.cn/ugc/share/thread/1663674265559047/?app=&target_app=13
Variant ‘A’, most closely related to the virus found in both bats and pangolins, is described as “the root of the outbreak” by researchers. Type ‘B’ is derived from ‘A’, separated by two mutations, then ‘C’ is in turn a “daughter” of ‘B’.
英文原文里不是这么写的。武汉本地人也有A类。武汉只上传了22个样本，里面A少B多。根本得不出武汉那五六万患者里没有A类的结论。LZ这种翻译是颠倒黑白带节奏的的典型做法
你更无法得出武汉另外那五六万患者里没有A类的结论
改几个字，tone就完全不一样
There are two subclusters of A which are distinguished by the synonymous mutation T29095C. In the T-allele subcluster, four Chinese individuals (from the southern coastal Chinese province of Guangdong) carry the ancestral genome, while three Japanese and two American patients differ from it by a number of mutations.
看见没有，美国人，你别还需要我翻译吧
https://directorsblog.nih.gov/2020/03/26/genomic-research-points-to-natural-origin-of-covid-19/
记者不专业, 断章取义的报道害死人。这是原文
There are two subclusters of A which are distinguished by the synonymous mutation T29095C. In the T-allele subcluster, four Chinese individuals (from the southern coastal Chinese province of Guangdong) carry the ancestral genome, while three Japanese and two American patients differ from it by a number of mutations. These American patients are reported to have had a history of residence in the presumed source of the outbreak in Wuhan. The C-allele subcluster sports relatively long mutational branches and includes five individuals from Wuhan, two of which are represented in the ancestral node, and eight other East Asians from China and adjacent countries. It is noteworthy that nearly half (15/33) of the types in this subcluster, however, are found outside East Asia, mainly in the United States and Australia.
谷歌翻译
A的两个子群以同义突变T29095C区分。在T-等位基因亚群中，有四个中国人（来自中国南方沿海省份广东省）带有祖传基因组，而三名日本人和两名美国病人则有许多突变。据报道，这些美国患者在推测的武汉疫情中曾有居住史。 C-等位基因亚簇具有相对较长的突变分支，包括来自武汉的五个人，其中两个代表祖先，以及来自中国和邻近国家的其他八位东亚人。值得注意的是，该子集群中将近一半（15/33）类型位于东亚以外地区，主要位于美国和澳大利亚。
非生物医学专业知识的读不懂很正常，这也是为何剑桥大学网给出科普解释文章的原因，难道世界顶级大学也成了大外宣？这和台湾攻击who一个强调
其实你小子如果懂英文，会认字，能耐那么一点心读一下你引的那段原文，结论跟你说的正相反。你还是无耻。
你说新冠病毒如果是人工合成的就会有从B退还到A'的可能。
看看你引的Dr Collins的一段：A new study debunks such claims by providing scientific evidence that this novel coronavirus arose naturally. 能看懂不？不是人造的！其实Collins写此文的目的就是要说他支持一组他了解的世界级科学家的研究结果，即新冠病毒不可能是人造的。苯啊。
再教你小子个乖乖，顶级生物杂志Science也有类似的文章，所以你想损中国，找别的路吧。
原论文没搜到引号里的“ the root of the outbreak”. 如此的引用太无耻了 来源: BeyondWind 于 2020-04-11 07:21:16 不要手电筒照别人不着自己，别像个任性的孩子，有点理智和逻辑
Forster and colleagues found that the closest type of COVID-19 to the one discovered in bats – type ‘A’, the “original human virus genome” – was present in Wuhan, but surprisingly was not the city’s predominant virus type.
Versions of ‘A’ were seen in Chinese individuals, and Americans reported to have lived in Wuhan, and mutated versions of ‘A’ were found in patients from the USA and Australia.
Wuhan’s major virus type, ‘B’, was prevalent in patients from across East Asia. However, the variant didn’t travel much beyond the region without further mutations – implying a 'founder event' in Wuhan, or 'resistance' against this type of COVID-19 outside East Asia, say researchers.
。。。
Variant ‘A’, most closely related to the virus found in both bats and pangolins, is described as 'the root of the outbreak' by researchers. Type ‘B’ is derived from ‘A’, separated by two mutations, then ‘C’ is in turn a “daughter” of ‘B’.
Versions of ‘A’ were seen in Chinese individuals, and Americans reported to have lived in Wuhan, and mutated versions of ‘A’ were found in patients from the USA and Australia.
简要说明是： A型 在中国人和称为在武汉居住过的美国人中检测到。
变异的A型 在美国和澳大利亚的患者中检测到。
文学城里有多少人看不懂英文？这样在北美生活不是很累吗？当然翻墙过来的人又当别论。