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根据最近提供给白宫和国会主要成员的一份机密情报报告，美国能源部已经得出结论，Covid大流行病很可能是由实验室泄漏引起的。
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能源部现在与联邦调查局一起表示，该病毒很可能是通过中国实验室的一个事故传播的。
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能源部的结论是新情报的结果，意义重大，因为该机构拥有相当多的科学专业知识，并监督着美国国家实验室网络，其中一些实验室进行先进的生物研究。
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其他四个机构以及一个国家情报小组仍然判断，这很可能是自然传播的结果，还有两个机构没有决定。
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国家情报局局长艾薇儿-海因斯办公室对2021年文件的更新强调了情报界的不同部门是如何对大流行病的起源做出不同的判断的。
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据阅读过该机密报告的人说，能源部做出的判断 “信心不足”。
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联邦调查局先前在2021年以 "适度的信心 "得出结论，大流行病很可能是实验室泄漏的结果，并且仍然坚持这一观点。
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联邦调查局得到了国家生物法医分析中心的支持，该中心于2004年在马里兰州的德特里克堡成立，负责分析生物威胁。
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美国官员拒绝透露导致能源部改变其立场的新情报和分析的细节。
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国家情报委员会和其他四个机构以 "低置信度 "评估该病毒是通过受感染动物的自然传播产生的。
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中央情报局和另一个机构仍然在实验室泄漏和自然传播的理论之间犹豫不决。
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该更新重申了这些机构之间现有的共识，即Covid-19不是中国生物武器计划的结果。
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美国高级情报官员证实，情报界进行了这次更新。
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这次更新是根据新的情报、对学术文献的进一步研究以及与政府以外的专家的磋商进行的。
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美国2021年的情报报告认为，Covid-19病毒首次在中国武汉传播的时间不晚于2019年11月。
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众议院和参议院共和党人正在向拜登政府和情报界施压，要求提供更多信息。
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目前还不知道是否会发布非保密的更新版本。
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斯坦福大学微生物学家大卫-雷尔曼（David Relman）对更新的调查结果表示欢迎，并鼓励客观地重新审视关于科维德起源的已知和未知的内容。
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能源部正在支持按照总统的指示对Covid-19的起源进行调查。
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联邦调查局拒绝发表评论。
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大流行病的起源一直是学术界、情报专家和立法者之间激烈的、有时是党派的辩论主题。
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雷尔曼博士敦促不要因为政治上的权宜之计而接受或放弃一个不完整的答案。
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美国2021年的情报报告是了解Covid-19起源的一个重要步骤。
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中国对世界卫生组织的调查进行了限制，并对该病毒可能从其某个实验室泄露出来的说法提出异议，认为它是在中国境外出现的。科学家们认为，该病毒可能是自然出现的，而情报分析人员则支持这一观点，并指出易受此类感染的动物贸易十分繁荣。没有经证实的Covid-19的动物来源，导致一些人认为实验室泄漏是最好的解释。
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美国国务院2018年的电报和中国的内部文件提出了对中国生物安全程序的担忧，实验室泄漏假说的支持者也引用了这一说法。武汉有许多实验室，其中一些是为了应对2002年开始的SARS疫情而建造或扩建的。人们一致认为Covid-19不是中国生物武器计划的结果，但报告称需要中国当局提供更多信息。
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2020年5月，能源部的劳伦斯-利弗莫尔国家实验室编写了一份研究报告，认为实验室泄漏的假设是可信的，值得进一步调查。美国的情报显示，武汉病毒研究所的三名研究人员于2019年11月生病，这也加剧了辩论。作为回应，拜登总统指示情报界加紧努力调查Covid-19的来源，并向国会通报。
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The U.S. Energy Department has concluded that the Covid pandemic most likely arose from a laboratory leak, according to a classified intelligence report recently provided to the White House and key members of Congress.
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The Energy Department now joins the Federal Bureau of Investigation in saying the virus likely spread via a mishap at a Chinese laboratory.
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The Energy Department’s conclusion is the result of new intelligence and is significant because the agency has considerable scientific expertise and oversees a network of U.S. national laboratories, some of which conduct advanced biological research.
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Four other agencies, along with a national intelligence panel, still judge that it was likely the result of a natural transmission, and two are undecided.
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The update to the 2021 document by Director of National Intelligence Avril Haines’s office highlights how different parts of the intelligence community have arrived at disparate judgments about the pandemic’s origin.
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The Energy Department made its judgment with “low confidence,” according to people who have read the classified report.
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The FBI previously concluded in 2021 with “moderate confidence” that the pandemic was likely the result of a lab leak and still holds to this view.
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The FBI is supported by the National Bioforensic Analysis Center, which was established at Fort Detrick, Md. in 2004 to analyze biological threats.
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US officials declined to give details on the fresh intelligence and analysis that led to the Energy Department changing its position.
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The National Intelligence Council and four other agencies assessed with “low confidence” that the virus came about through natural transmission from an infected animal.
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The Central Intelligence Agency and another agency remain undecided between the lab-leak and natural-transmission theories.
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The update reaffirmed an existing consensus between the agencies that Covid-19 wasn’t the result of a Chinese biological-weapons program.
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The senior U.S. intelligence official confirmed that the intelligence community conducted the update.
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The update was done in light of new intelligence, further study of academic literature and consultation with experts outside government.
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The US 2021 intelligence report concluded that the Covid-19 virus first circulated in Wuhan, China, no later than November 2019.
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House and Senate Republicans are pressing the Biden administration and the intelligence community for more information.
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It is unknown if an unclassified version of the update will be issued.
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Stanford University microbiologist David Relman welcomed the updated findings and encouraged an objective re-examination of what is known and not known about Covid origins.
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The Energy Department is supporting the investigation into the origins of Covid-19 as directed by the President.
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The FBI declined to comment.
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The origins of the pandemic have been the subject of vigorous and sometimes partisan debate among academics, intelligence experts and lawmakers.
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Dr. Relman urged that an incomplete answer should not be accepted or given up due to political expediency.
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The US 2021 intelligence report is an important step in understanding the origins of Covid-19.
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China has placed limits on investigations by the World Health Organization and disputed that the virus could have leaked from one of its labs, suggesting it emerged outside China. Scientists argue that the virus probably emerged naturally, while intelligence analysts support this view and point to the flourishing trade in animals that are susceptible to such infections. There is no confirmed animal source for Covid-19, leading some to suggest a lab leak is the best explanation.
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U.S. State Department cables from 2018 and internal Chinese documents have raised concerns about China’s biosafety procedures, which have been cited by proponents of the lab-leak hypothesis. Wuhan is home to many laboratories, some of which were built or expanded in response to the SARS epidemic beginning in 2002. There is a consensus that Covid-19 wasn’t the result of a Chinese biological-weapons program, but the report said more information was needed from the Chinese authorities.
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In May 2020, the Energy Department’s Lawrence Livermore National Laboratory prepared a study concluding that a lab-leak hypothesis was plausible and deserved further investigation. Debate has also been fueled by U.S. intelligence that three researchers from the Wuhan Institute of Virology became sick in November 2019. In response, President Biden directed the intelligence community to step up its efforts to investigate the origins of Covid-19 and Congress to be kept informed.
链接：A Lab Leak in China Most Likely Origin of Covid Pandemic, Energy Department Says - WSJ
