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Original Mr. Xiao Ceng 01 General Surgery Dr. Zeng

Text | edited by Dr. Zeng | ｜xuan

In the past two days, many friends saw a picture on the Internet, which said that the CDC confirmed that the first coronavirus came from the United States.

Is it true?/You don’t say.

This is a fake news, which belongs to a translation error. Please look at the English in the picture carefully. The article reads: "CDC Confirms the first us corona virus case of" unknown "origin".

The real meaning of this sentence is: CDC (American Centers for Disease Control and Prevention) confirmed that the first case of COVID-19’s patient with undetermined etiology appeared in the United States. Not that novel coronavirus is from the United States.

In fact, the news said that a patient who could not find the source of infection was found in the United States.

The US Centers for Disease Control and Prevention reported that a COVID-19 patient who was diagnosed on February 26th local time has not left the United States recently, nor has he had contact with any confirmed cases, and it is planned to be the first COVID-19 patient in the United States whose etiology cannot be determined.

According to an official of the center, the patient is from northern California, and officials are currently tracking all the people who have been in contact with the patient recently.

Therefore, this is a complete translation error. I don’t know if it was intentional or unintentional.

So, where is the origin of the virus?

Academician Zhong Nanshan said that the virus may not have originated in China.

On February 27th, Zhong Nanshan, an expert from China Health and Wellness Committee, said at an official press conference in Guangzhou, "There are some situations abroad. The epidemic first appeared in China and did not necessarily originate in China. "

Recently, Zhang Wenhong, head of the clinical team of novel coronavirus and director of the infectious diseases department of Huashan Hospital of Fudan University, said that he disagreed with the statement that Covid-19 was from a foreign country.

On February 28th, Zhang Wenhong said in an interview that Wuhan was the first city in China where this new infectious disease appeared. If it spread from abroad to China, it should happen in several cities at the same time, rather than one after another.

About the origin of the virus, about patient zero, we need to rely on evidence to speak.

Want to know where the virus came from, where is the origin, can be judged from two aspects:

Judge:

First of all, we can investigate when and where the virus first appeared, and where it first appeared, so this place is the birthplace of the virus.

Of course, in the vast sea of people, patient zero may not be easy to find. If you can’t find it, there are other ways.

We can also find out the evolutionary process of the virus through gene analysis, find out where the virus belongs to our ancestors and where the virus belongs to our grandfather, son or grandson, so that we can also find the origin of the virus.

Taiwan Province expert: According to a paper, it can be concluded that the source of Covid-19 is the United States?

A few days ago, on a TV program in Taiwan Province, an expert pointed out that according to genetic analysis, Covid-19 was divided into five families. As a result, it was found that there were five in the United States and only one in China.

Because the virus in the United States is more complete, "the United States is the source."

In fact, experts from Taiwan Province deduced from a mainland document, but this document did not reach such a conclusion, and experts from Taiwan Province were over-interpreted.

This article is from the mainland, and it is currently published in Science and Technology of China Academy of Sciences.

Paper pre-release platform:

Http://www.chinaxiv.org/abs/202002.00033, without peer review, is not officially published.

The authors of this study are from Xishuangbanna Tropical Botanical Garden of China Academy of Sciences, South China Agricultural University and Beijing Brain Center.

The researchers collected the genome data of 93 novel coronavirus samples from 12 countries in four continents, which were shared in the GISAID EpiFluTM database from all over the world (as of February 12th), and traced the source of infection and the spread path through the analysis of the whole genome data.

It is found that the 93 samples received contain 58 haplotypes, which can be classified into five groups, including three old super-propagator haplotypes (H1,H3 and H13) and two new super-propagator haplotypes (H56 and mv2).

From this, it can be identified that there may be three sources of viruses in Guangdong, and there are two sources of viruses in Chongqing and Taiwan Province.

Australia, France, Japan and the United States, which have many samples, have at least two sources of infection, especially the United States, which includes five sources.

The virus samples of "ancient" haplotypes H13 and H38 were traced back to patients from Shenzhen (the first case in Guangdong) and patients from Washington State (the first case in the United States).

Their travel records show that they should all be infected during visiting relatives in Wuhan from the end of December 2019 to the beginning of January 2020.

Haplotypes H13 and H38 were not detected in the existing Wuhan samples, probably because the existing samples were mainly collected from several designated hospitals, and the sampling time was limited to December 24th, 2019 and January 5th, 2020.

The conclusion of this paper is as follows: novel coronavirus in South China seafood market was introduced from other places, and spread rapidly in the market and spread outside the market.

That is to say, through the genetic analysis of the virus, scientists found that the first case of Shenzhen and the United States, their virus originated earlier than the patients in South China seafood market, that is to say, South China seafood market is not the birthplace of the virus, but it cannot be said that the United States is the birthplace of Covid-19.

So, at present, we haven’t found the birthplace of Covid-19, and we need more evidence. We hope that scientists can do more research and discover the origin of the virus as soon as possible, which will help us to study the virus, understand its transmission mode, intermediate host and transmission law, and be more helpful to disease prevention and control.

PS: The picture is from the Internet. Please contact to delete the infringement.

THE END

Original title: "CDC recognizes that Covid-19 is from the United States? Is it true?/You don’t say. Is America finally telling the truth? 》

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