繁体中文  
 
版主:黑木崖
 · 九阳全新免清洗型豆浆机 全美最低
 
Study concludes COVID-19 'is not a lab construcy'
送交者:  2020年03月27日18:07:43 于 [世界军事论坛] 发送悄悄话
Good Morning America

Sorry, conspiracy theorists. Study concludes COVID-19 'is not a laboratory construct'

KATE HOLLAND
Good Morning America
Sorry, conspiracy theorists. Study concludes COVID-19 'is not a laboratory construct' (ABC News)
Sorry, conspiracy theorists. Study concludes COVID-19 'is not a laboratory construct' (ABC News)

Conspiracy theories claiming COVID-19 was engineered in a lab as part of a biological attack on the United States have been gaining traction online in recent weeks, but a new study on the origins of the virus has concluded that the pandemic-causing strain developed naturally.

An analysis of the evidence, according to the findings first published in the scientific journal Nature Medicine, shows that the novel coronavirus "is not a laboratory construct or a purposefully manipulated virus," with the researchers concluding "we do not believe that any type of laboratory-based scenario is plausible."

"There’s a lot of speculation and conspiracy theories that went to a pretty high level," Dr. Robert Garry, a professor at the Tulane University School of Medicine and one of the authors of the study, told ABC News, "so we felt it was important to get a team together to examine evidence of this new coronavirus to determine what we could about the origin."

Tune into ABC at 1 p.m. ET and ABC News Live at 4 p.m. ET every weekday for special coverage of the novel coronavirus with the full ABC News team, including the latest news, context and analysis.

Dr. Francis Collins, the director of the National Institutes of Health, supported the study’s findings, writing on his blog, "This study leaves little room to refute a natural origin for COVID-19."

Researchers concluded that the novel coronavirus is not a human creation because it does not share any "previously used virus backbone." It likely arose, the study said, from a recombination of a virus found in bats and another virus, possibly originating from pangolins, otherwise known as scaly anteaters.

MORE: Coronavirus live updates: US now leads world with over 82,000 cases

COVID-19 is 96% identical to a coronavirus found in bats, researchers said, but with a certain variation that could explain what has made it so infectious.

"We know from the study of other coronaviruses that they’re able to acquire this [variation] and they can then become more pathogenic," Garry told ABC News. "This is a good explanation as to why this virus is so transmittable and has caused this pandemic."

PHOTO: This handout illustration image taken with a scanning electron microscope shows SARS-CoV-2 (yellow)also known as 2019-nCoV, the virus that causes COVID-19isolated emerging from the surface of cells (blue/pink) cultured in the lab. (Handout/National Institutes of Health/AFP via GettY Images)

The mutation in surface proteins, according to Garry, could have triggered the outbreak of the pandemic, but it’s also possible that a less severe version of the illness was circulating through the population for years, perhaps even decades, before escalating to this point.

"We don’t know if those mutations were picked up more recently or a long time ago," Garry told ABC News. "It’s impossible to say if it actually was a mutation that triggered the pandemic, but either way, it would have been a naturally occurring process."

And while many believe the virus originated at a fish market in Wuhan, China, Garry said that is also a misconception.

"Our analyses, and others too, point to an earlier origin than that," Garry said. "There were definitely cases there, but that wasn’t the origin of the virus."

What to know about coronavirus:

Sorry, conspiracy theorists. Study concludes COVID-19 'is not a laboratory construct' originally appeared on abcnews.go.com


0%(0)
0%(0)
标 题 (必选项):
内 容 (选填项):
实用资讯
北美最大最全的折扣机票网站
美国名厂保健品一级代理,花旗参,维他命,鱼油,卵磷脂,30天退货保证.买百免邮.
一周点击热帖 更多>>
一周回复热帖
历史上的今天:回复热帖
2019: 波音737 Max的新软件补丁,内容发布
2019: 中国拟大幅增购美猪肉促成协议
2018: 该考虑24架轰六K200架歼轰七30架苏30和
2018: 始皇帝南巡中国南海的强大阵容(图)
2017: 东帝汶前共产党游击队员当选为总统
2017: 模拟最真实的飞行 它们是四海八荒最厉害
2016: 西方急红了眼!中国一技术令美国也搞不
2016: 中国时报社论-文革五十周年的反思与警
2015: BBC: 日本前军官:海上自卫队比中国海
2015: 土鳖之土 登峰造极。。。