Does the new coronavirus come from the United States? Is it confirmed by authoritative literature? Everyone was cheated by some self-media
Foreign scientists have found that according to the order of
generation, the new coronavirus can be divided into three types: A, B and C.
The prevalent type A in the United States is mainly type A of the grandfather's
generation, while the type B of the father's generation is mainly prevalent in
China, so the new crown virus is From the United States?
The new crown virus is in a global pandemic. The source of
the new crown virus has always been a controversial topic. How the virus
spreads through mutation is also a topic of concern to scientists.
Recently, researchers from Cambridge, Britain and Germany
used gene network technology to reconstruct the early "evolutionary
path" of COVID-19 in humans.
Coronavirus Mutated into its Several Types
The research results were published in the authoritative journal Proceedings of the National Academy of Sciences (PANS). The study found that the current global infections of new coronaviruses are not actually the same, but mutated into three types, A, B, and C.
Type A is the most Ancient, B
comes from A, and C comes from B. Simply put, A, B, and C are equivalent to the
relationship between grandfather, father, grandson, and son.
Determination whether COVID-19 Came from China or USA
As soon as this article came out, it was fried in China, because the study showed that the ancient type A mainly exists in the United States and Australia, while type B is mainly popular in China, and type B comes from type A, so many friends think the new coronavirus is from the United States.
1. According to the evolution of viruses, they can be divided into three types
The researchers used the new coronavirus found in bats as the
common ancestor of the new coronavirus, because Shi Zhengli and others from the
Wuhan Institute of Virology in China found that a coronavirus in bats has a
96.2% similarity to the gene sequence of the new coronavirus Therefore, the new
coronavirus in this epidemic is likely to come from bats.
This study analyzes the first batch of 160 complete virus
genomes collected from around the world. From the perspective of virus
evolution, viruses can be divided into three categories: A, B, and C.
2. The three types of distribution are not the same
Type A is the most primitive strain. It is believed to be the ancestor of the new coronavirus that spread from bats to humans.
Five Wuhan
people were infected with type A virus, and four Guangdong people. These four
Guangdong cases had traveled to Wuhan. history.
What is strange is that, although type A virus was first
discovered in China, it is most common in the United States. Early American
cases also have a history of travel to Wuhan.
The study found that two-thirds of American samples were
infected with type A virus, but most of the infected patients came from the
West Coast, not New York, which is currently the "epicenter" of the
US epidemic.
Type B is considered to be a variant of type A and is most common in East Asian countries. There are 93 cases of type B, and 74 cases are distributed in China and Asian countries adjacent to China.
There are 22 cases
in Wuhan, 31 cases in eastern China and other regions, and 21 cases in Asian
countries adjacent to China.
Type C is believed to be derived from type B mutations, but
type C is not found in mainland China, and is found in Hong Kong, Taiwan, and
Singapore.
More importantly, most of the C-types are found in Europe, including France, Italy, England, Sweden and other countries. The C-types circulating in Europe may be the type B mutations that spread in China and East Asia.
The new analysis also shows that one of the earliest ways of
introducing the new coronavirus into Italy is related to the first patient
confirmed in Germany on January 27, and the other route of infection is related
to cases in Singapore. It can be seen that the genetic network technology used
by the researchers can accurately track the existing infection routes.
In general, Type A is mainly distributed in the United States
and Australia, Type B is mainly distributed in China and East Asian countries,
and Type C is mainly located in Europe.
3. Why did Type A not spread in China, but the United States?
According to publicly released information, Type A first
appeared in Wuhan, but it did not cause a large spread in Wuhan. Why type A
virus did not appear on a large scale in Wuhan and China, but type B mutated
from type A, it is likely that type A does not adapt to the local immune
system, so it mutated into type B.
It may be because more local cases are transmitted by type B
infected persons, which is the "founder effect" in genetics.
The reason why type A appears more in the United States and Australia may be because type A is more adapted to the immune system of people there.
However, because type A has appeared in Wuhan, infected some people in
Wuhan, and also infected Americans who have lived and traveled in Wuhan, the
author of the paper believes that based on the available evidence, the type A
virus in the United States may have passed this way. of.
Can we conclude that the source of coronavirus is the United States?
No, this article does not indicate that the source of the
virus is from the United States. The author of the paper has never said that.
If you read the original text carefully, the entire article does not mention
that the source of the virus is the United States.
In fact, the data used in this article comes from data
publicly uploaded to public databases, and it is impossible to draw such a
conclusion.
Don’t forget, according to publicly released data, China is
indeed the first country to have an outbreak, and it is also the first Chinese
scientist to isolate and identify the new coronavirus. The genetic data of the
first new coronavirus was sequenced by Chinese scientists.
After that, various countries will isolate and sequence the
viruses found in their countries, upload them to public databases, and
scientists all over the world can download and study them.
Therefore, based on such publicly released data, it is
unlikely that the virus originated from the United States.
Many people suspect that the virus originated in the United States. Among the patients who died of influenza in the United States, some may have died of the new crown virus.
Others believe that the e-cigarette pneumonia
incident in the United States last year may be caused by the new crown virus.
However, these are just speculations, and there is no real evidence. If you want to prove that the virus came from the United States, unless you can find that the United States had an epidemic earlier than China, such as retesting the throat swabs of patients with flu symptoms in the United States last year.
If in September or October, the new coronavirus can be found
in throat swabs even earlier, which can prove that the epidemic in the United
States has appeared long before China.
Therefore, at present, there is no definite evidence about
the origin of the virus. Where the virus came from requires further research.
In fact, no matter where the virus comes from, it has already spread globally.
It is a problem that people all over the world need to face together. Only by
working together can we overcome the epidemic.
Author's Bio
Name: Gwynneth May
Educational Qualification: MBBS, MD (Medicine) Gold Medalist
Profession: Doctor
Experience: 16 Years of Work Experience as a Medical Practitioner
Comments
Post a Comment