COVID-19 likely in US before Wuhan; world should not turn a blind eye to similar cases: experts

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COVID-19 likely in US before Wuhan; world should not turn a blind eye to similar cases: experts

โพสต์โดย admin » พุธ 06 ม.ค. 2021 3:40 pm

COVID-19 likely in US before Wuhan; world should not turn a blind eye to similar cases: experts
By Liu Caiyu and Fan Lingzhi Source: Global Times Published: 2020/12/2 20:14:38
21
China may have been ‘whistleblower for the world’ on pandemic: experts
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People wearing face masks walk on a street in Washington, D.C., the United States, Aug. 14, 2020. A new ensemble forecast published by the U.S. Centers for Disease Control and Prevention (CDC) has projected up to 200,000 total COVID-19 deaths in the U.S. by Sept. 5.Photo:Xinhua
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China does not seek to alter the virus origin story as some Western media claimed; it is a fact that China may have been the whistleblower of the pandemic, as mounting academic and official evidence have shown the early existence of the novel coronavirus in multiple places around the world, experts noted, after acknowledging the possible early existence of the virus in Italy, Spain and the US. But China is calling for an open mind toward the complicated scientific question.

Research by the US Centers for Disease Control and Prevention (CDC) suggested Americans may have first been infected in mid-December as antibodies were found in blood samples in US states, according to the Wall Street Journal on Tuesday.

The findings suggest that SARS-CoV-2 (the strain of coronavirus that causes COVID-19) infections may have been present in the US in mid-December 2019, weeks earlier than Wuhan reported its first case and about a month earlier than the reported first case in the US.

The first COVID-19 infection in the US was reported on January 19, 2020 and China reported its first COVID-19 patient in Wuhan in December 2019.


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A recent US CDC report found COVID-19 antibodies in blood samples as early as Dec 13, 2019. With more & more evidence surfacing about the coronavirus' origins in places outside China before Wuhan detected it, the world is remapping the history of the COVID-19 pandemic. Infographic:GT
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The findings again refresh people's knowledge of the early existence of the novel coronavirus before Wuhan identified its first case. A study by Italy's National Cancer Institute of Milan found the novel coronavirus in blood samples collected in October 2019, and research led by the University of Barcelona showed the presence of the virus in samples of sewage in Barcelona in March 2019.

The Chinese Foreign Ministry and observers on Wednesday called for a more open mind to answer the puzzle, which should be done by scientists around the world.

Hua Chunying, spokesperson of the Chinese Foreign Ministry, said the epidemic broke out in multiple places and the study from the US CDC also verified it, but she stressed that tracing the source of coronavirus is a scientific work, which must be done by global scientists. "We hope other countries could work with the WHO to prepare for future public health crises," she said.

"Facts will speak for themselves. We cannot turn a blind eye to the possibility of the early existence of the virus in many countries," Liang Manchun, an associate research fellow at the Institute for Public Safety Research of Tsinghua University, told the Global Times on Wednesday.

Asked whether the discovery of antibodies in the blood is reliable evidence for the virus origin, a virologist told the Global Times on condition of anonymity that many countries, such as Brazil, Italy and Spain, reported early blood samples being found positive for nucleic acids, but the results may be "false positive." Same with antibodies, the virologist said, noting "antibodies do not directly represent the existence of the virus. Positive antibodies may be caused by some non-specific or similar viral infection."

He believes the gene sequencing of the viral strain is the best evidence to clarify the early existence of the epidemic in various countries.

The US study offers one more direction for seeking the virus origin but we cannot draw a conclusion easily as the complicated scientific questions are beyond one or two scientists' capability to complete, as they require large amounts of data, probably involving various countries, a Beijing-based public health expert reached by the Global Time said.

However, the Global Times found that before any conclusion can be made on where the virus originated, some Western media have continuously taken Wuhan as the birthplace of the virus and even slandered China of trying to shirk responsibility. British media the Guardian claimed China is running a "propaganda campaign" that leans toward possible alternative origins.

Chinese observers noted that when scientists in the world are still working to track the virus and solve the urgent dilemma everyone faces, the international community shall maintain an open attitude toward it. Simply taking China as the one to be blamed for the pandemic will bring no good to solving the problem, and the possibility of China being a whistleblower of the pandemic cannot be ruled out, they noted.

The Global Times found that after the CDC study, American netizens swarmed online, claiming they had experienced a horrible time in December last year, showing similar symptoms with the COVID-19.

"Yup. Had the weirdest 'flu' last December. Nothing but a hard cough and some minor congestion,' a Twitter user wrote. Another said "When I took my son to a packed ER in January with severe flu-like symptoms, he tested negative for the flu but the doctor said all of the other patients in the waiting room hacking up a lung tested negative, too. Maybe Covid was the mystery illness?"

In March, when asked if some people in the US actually died of coronavirus rather than influenza last year, US CDC director Robert Redfield admitted that some cases were wrongly diagnosed.



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Re: COVID-19 likely in US before Wuhan; world should not turn a blind eye to similar cases: experts

โพสต์โดย admin » พุธ 06 ม.ค. 2021 3:53 pm

The coronavirus was circulating in Europe and China months before officials identified the outbreak in Wuhan, studies show

Screenshot_20210106-154659.jpg
Screenshot_20210106-154659.jpg (265.55 KiB) เปิดดู 419 ครั้ง


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HOMEPAGE
HOME SCIENCE
The coronavirus was circulating in Europe and China months before officials identified the outbreak in Wuhan, studies show
Aylin Woodward Dec 23, 2020, 3:51 AM
italy coronavirus mask flag
A man walks past a billboard that reads "All together, without fear," in Naples, Italy, March 22, 2020. Carlo Hermann /AFP/Getty
December 31 marks the anniversary of the first confirmed coronavirus cases in Wuhan.
But a growing body of evidence suggest the virus was circulating in China and some European countries months before that.
In the US, meanwhile, a study found that some people had coronavirus antibodies in December 2019.
Visit Business Insider's homepage for more stories.

Almost exactly one year has passed since the World Health Organization announced the first confirmed cases of the new coronavirus.

Yet the virus' origin and the true timeline of its worldwide spread remain a mystery. A growing body of evidence now suggests it was circulating months before the first cases captured global attention in Wuhan, China.

A study from Milan's National Cancer Institute found that four of Italy's coronavirus cases dated back to October 2019. Research from China shows people were getting sick in Wuhan in November and early December: One analysis, based on satellite images of Wuhan hospitals and online searches for COVID-19 symptoms in the area, suggested the virus may have started circulating there as early as late summer.

Although pinpointing the exact date of the virus's first jump from animals to people is impossible without more data, many studies suggest the pandemic's December anniversary is arbitrary.

"It is perfectly possible that the initial cross-species transmission event did not happen in or around Wuhan itself," Edward Holmes, a virologist at the University of Sydney, told The Guardian.

The virus was spreading in Wuhan before December

Screenshot_20210106-155021.jpg
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Authorities in Wuhan initially told the WHO about a mysterious, new virus on December 31. But government records show China's first coronavirus case happened on November 17, 2019, according to an investigation by the South China Morning Post.

According to the SCMP, Chinese medical experts pinpointed 60 coronaviruses cases from November and December by reanalyzing samples taken from patients seen during that time. That analysis showed that a 55-year-old from Hubei province (where Wuhan in located), was the first known case of COVID-19 in the world, though the disease hadn't received that name yet.

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In another study, researchers at Harvard University used satellite imagery of Wuhan to measure traffic to six city hospitals. They saw an uptick starting in August 2019, which peaked six months later. This timeline coincided with an increase in online search traffic for terms like "diarrhea" and "cough," the study authors found.

Even an investigation of the Wuhan market linked to many of the early cases has shown that it wasn't the origin site of the pandemic. Among the 41 coronavirus cases Wuhan first reported, many were people who visited or worked at the Huanan Seafood Wholesale Market. But according to a report in The Lancet, 13 of those original cases had no link to the market.

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DOW
+0.56%
S&P 500
+0.71%
NASDAQ 100
+0.95%
HOMEPAGE
HOME SCIENCE
The coronavirus was circulating in Europe and China months before officials identified the outbreak in Wuhan, studies show
Aylin Woodward Dec 23, 2020, 3:51 AM
italy coronavirus mask flag
A man walks past a billboard that reads "All together, without fear," in Naples, Italy, March 22, 2020. Carlo Hermann /AFP/Getty
December 31 marks the anniversary of the first confirmed coronavirus cases in Wuhan.
But a growing body of evidence suggest the virus was circulating in China and some European countries months before that.
In the US, meanwhile, a study found that some people had coronavirus antibodies in December 2019.
Visit Business Insider's homepage for more stories.

Almost exactly one year has passed since the World Health Organization announced the first confirmed cases of the new coronavirus.

Yet the virus' origin and the true timeline of its worldwide spread remain a mystery. A growing body of evidence now suggests it was circulating months before the first cases captured global attention in Wuhan, China.

A study from Milan's National Cancer Institute found that four of Italy's coronavirus cases dated back to October 2019. Research from China shows people were getting sick in Wuhan in November and early December: One analysis, based on satellite images of Wuhan hospitals and online searches for COVID-19 symptoms in the area, suggested the virus may have started circulating there as early as late summer.

Although pinpointing the exact date of the virus's first jump from animals to people is impossible without more data, many studies suggest the pandemic's December anniversary is arbitrary.


"It is perfectly possible that the initial cross-species transmission event did not happen in or around Wuhan itself," Edward Holmes, a virologist at the University of Sydney, told The Guardian.

The virus was spreading in Wuhan before December
Wuhan hospital
Healthcare workers transport bodies outside a hospital in Wuhan, China, February 5, 2020. Getty
Authorities in Wuhan initially told the WHO about a mysterious, new virus on December 31. But government records show China's first coronavirus case happened on November 17, 2019, according to an investigation by the South China Morning Post.

According to the SCMP, Chinese medical experts pinpointed 60 coronaviruses cases from November and December by reanalyzing samples taken from patients seen during that time. That analysis showed that a 55-year-old from Hubei province (where Wuhan in located), was the first known case of COVID-19 in the world, though the disease hadn't received that name yet.

Wuhan lockdown
Security personnel wear masks walk in front of a field hospital in Wuhan on April 9, 2020. Noel Celis/AFP/Getty Images
In another study, researchers at Harvard University used satellite imagery of Wuhan to measure traffic to six city hospitals. They saw an uptick starting in August 2019, which peaked six months later. This timeline coincided with an increase in online search traffic for terms like "diarrhea" and "cough," the study authors found.


Even an investigation of the Wuhan market linked to many of the early cases has shown that it wasn't the origin site of the pandemic. Among the 41 coronavirus cases Wuhan first reported, many were people who visited or worked at the Huanan Seafood Wholesale Market. But according to a report in The Lancet, 13 of those original cases had no link to the market.

wuhan wet market
This wet market in Wuhan, China, pictured on January 21, 2020, was linked to one of the earliest coronavirus outbreaks. Dake Kang/AP
A May investigation also led the Chinese Center for Disease Control and Prevention to rule the market out as the origin place of the outbreak. That's because none of the animals there tested positive for the virus.

Most likely, the market was simply the site of an early superspreader event, with one sick person infecting an atypically large number of others. Superspreader events around the world have created clusters of infections that cropped up almost overnight.

Research suggests the virus was in Italy last fall


Screenshot_20210106-155458.jpg
Screenshot_20210106-155458.jpg (228.42 KiB) เปิดดู 419 ครั้ง


Italy recorded its first official coronavirus case in Lombardy on February 21. Yet a recent study found coronavirus antibodies in blood samples collected from 23 Italians in September and 27 in October.


DOW
+0.56%
S&P 500
+0.71%
NASDAQ 100
+0.95%
HOMEPAGE
HOME SCIENCE
The coronavirus was circulating in Europe and China months before officials identified the outbreak in Wuhan, studies show
Aylin Woodward Dec 23, 2020, 3:51 AM
italy coronavirus mask flag
A man walks past a billboard that reads "All together, without fear," in Naples, Italy, March 22, 2020. Carlo Hermann /AFP/Getty
December 31 marks the anniversary of the first confirmed coronavirus cases in Wuhan.
But a growing body of evidence suggest the virus was circulating in China and some European countries months before that.
In the US, meanwhile, a study found that some people had coronavirus antibodies in December 2019.
Visit Business Insider's homepage for more stories.

Almost exactly one year has passed since the World Health Organization announced the first confirmed cases of the new coronavirus.

Yet the virus' origin and the true timeline of its worldwide spread remain a mystery. A growing body of evidence now suggests it was circulating months before the first cases captured global attention in Wuhan, China.

A study from Milan's National Cancer Institute found that four of Italy's coronavirus cases dated back to October 2019. Research from China shows people were getting sick in Wuhan in November and early December: One analysis, based on satellite images of Wuhan hospitals and online searches for COVID-19 symptoms in the area, suggested the virus may have started circulating there as early as late summer.

Although pinpointing the exact date of the virus's first jump from animals to people is impossible without more data, many studies suggest the pandemic's December anniversary is arbitrary.


"It is perfectly possible that the initial cross-species transmission event did not happen in or around Wuhan itself," Edward Holmes, a virologist at the University of Sydney, told The Guardian.

The virus was spreading in Wuhan before December
Wuhan hospital
Healthcare workers transport bodies outside a hospital in Wuhan, China, February 5, 2020. Getty
Authorities in Wuhan initially told the WHO about a mysterious, new virus on December 31. But government records show China's first coronavirus case happened on November 17, 2019, according to an investigation by the South China Morning Post.

According to the SCMP, Chinese medical experts pinpointed 60 coronaviruses cases from November and December by reanalyzing samples taken from patients seen during that time. That analysis showed that a 55-year-old from Hubei province (where Wuhan in located), was the first known case of COVID-19 in the world, though the disease hadn't received that name yet.

Wuhan lockdown
Security personnel wear masks walk in front of a field hospital in Wuhan on April 9, 2020. Noel Celis/AFP/Getty Images
In another study, researchers at Harvard University used satellite imagery of Wuhan to measure traffic to six city hospitals. They saw an uptick starting in August 2019, which peaked six months later. This timeline coincided with an increase in online search traffic for terms like "diarrhea" and "cough," the study authors found.


Even an investigation of the Wuhan market linked to many of the early cases has shown that it wasn't the origin site of the pandemic. Among the 41 coronavirus cases Wuhan first reported, many were people who visited or worked at the Huanan Seafood Wholesale Market. But according to a report in The Lancet, 13 of those original cases had no link to the market.

wuhan wet market
This wet market in Wuhan, China, pictured on January 21, 2020, was linked to one of the earliest coronavirus outbreaks. Dake Kang/AP
A May investigation also led the Chinese Center for Disease Control and Prevention to rule the market out as the origin place of the outbreak. That's because none of the animals there tested positive for the virus.

Most likely, the market was simply the site of an early superspreader event, with one sick person infecting an atypically large number of others. Superspreader events around the world have created clusters of infections that cropped up almost overnight.

Research suggests the virus was in Italy last fall
italy coronavirus
A COVID-19 patient is transported by nurses inside a biological containment stretcher in the Da Procida Hospital in Salerno, Italy, April 8, 2020. Ivan Romano/Getty Images
Italy recorded its first official coronavirus case in Lombardy on February 21. Yet a recent study found coronavirus antibodies in blood samples collected from 23 Italians in September and 27 in October.


"Our results indicate that SARS-CoV-2 circulated in Italy earlier than the first official COVID-19 cases were diagnosed in Lombardy, even long before the first official reports from the Chinese authorities, casting new light on the onset and spread of the COVID-19 pandemic," the authors wrote. (SARS-CoV-2 is the clinical name of the virus.)

A study conducted by Rome's Department of Environment and Health supports that conclusion: Researchers found the coronavirus' genetic material in sewage samples from Milan and Turin dating back to December 18, 2019.

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Spain and France also found clues that the virus was circulating in 2019
In May, doctors at a Paris hospital discovered that a patients they'd treated for pneumonia on December 27 had been sick with COVID-19. France didn't record its first official case until January 24, however.

Screenshot_20210106-155809.jpg
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In Spain, meanwhile, researchers from the University of Barcelona found evidence of the coronavirus in city sewage samples collected in mid-January, six weeks before the country's first official case.

Surprisingly, a sewage sample collected on March 12, 2019 also tested positive for traces of the coronavirus. But testing wastewater isn't a perfect way to detect outbreaks, as Claire Crossan wrote in The Conversation. So it's possible that March sample had been contaminated during study.

By December 2019, the virus had reached the US
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Research in the US, too, offers evidence that the virus had gone global before humanity even knew it existed.

The US recorded its first coronavirus case on January 20. But according to one study, the virus had reached the Pacific Northwest at least a month earlier. Blood samples collected by the American Red Cross in nine states, including California, Oregon, and Washington, showed that some Americans had coronavirus antibodies as early as December 13, 2019.

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Antibodies are an imperfect measure of the outbreak, since some research suggests our immune systems can create antibodies that recognize the new coronavirus in response to some common colds. Antibody tests can also yield false positives.

Yet in the past, scientists successfully used retrospective antibody studies to trace the origins of SARS and Middle East respiratory syndrome (MERS) — both coronaviruses. Virologists found antibodies specific to SARS in civet cats, and antibodies specific to MERS in camels, which is how they determined those to be each virus' animal progenitor.

Further examination of blood samples taken in 2019 could be the best way to find out when this pandemic really began.

read more
https://www.businessinsider.com/coronav ... ak-2020-12

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ลงทะเบียนเมื่อ: พฤหัสฯ. 21 พ.ค. 2015 12:14 pm
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Re: COVID-19 likely in US before Wuhan; world should not turn a blind eye to similar cases: experts

โพสต์โดย admin » พุธ 06 ม.ค. 2021 4:05 pm




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