The key mutation of novel coronavirus is in the receptor binding site of the spiking protein, which easily opens the door for the virus to infect people, making it easy for the virus to invade the body and cause disease. This is the reason why novel coronavirus has become more infectious, said Zhong Nanshan, a member of the Chinese Academy of Sciences.
So we have to keep track of the mutated virus, but we also have to think about which strain of the virus to use as a vaccine.
Is it possible that the virulence of novel coronavirus will change slowly, and become something like influenza, which changes from year to year?
The flu vaccine we use every year, the WHO looks at the three strains that are likely next year, and then makes the vaccine.
In the future, whether the novel coronavirus will be the same, we need to follow up closely.
The key mutation of novel coronavirus is in the receptor binding site of the spiking protein, which easily opens the door for the virus to infect people, making it easy for the virus to invade the body and cause disease. This is the reason why novel coronavirus has become more infectious, said Zhong Nanshan, a member of the Chinese Academy of Sciences.
Spring Festival is approaching, I believe many people have begun to prepare for the Spring Festival goods.
When it comes to Spring Festival goods, meat is a must.
However, since the outbreak, many Novel Coronavirus detection products and environmental cold-chain-related news have been reported.
So, here’s the problem.
All meat products are inextricably linked to the cold chain, and “cold chain logistics” has been pushed to the forefront again and again.
Therefore, preventing the spread of novel coronavirus in the cold chain is the top priority, and how to prevent the spread of novel coronavirus in the cold chain is also a hot topic.
Is it important to prevent the spread of novel coronavirus in the cold chain?
Zhu Yi, an associate professor at the College of Food Science and Nutritional Engineering of China Agricultural University, said that the contamination of novel coronavirus has nothing to do with whether the product is fish, shrimp, chicken wings or its packaging. The key is the cold chain environment. Under the low temperature condition of -18℃ throughout the whole process, the virus that hates heat and likes cold is more suitable for survival.
Li Lanjuan, an academician of the Chinese Academy of Engineering, has also popularized the living environment of viruses. She pointed out that “under normal circumstances, viruses can survive for a long time in the cold chain.
Among the viruses we know and master, the general virus can survive for 3-6 months at about 4℃, and in the environment below minus 20℃, can survive for about 20 years.
Of course, different viruses live for different periods of time.
Cold chain food is closely related to people’s life, and viruses are more likely to survive in cold chain conditions.
Therefore, the importance of preventing the spread of novel coronavirus in the cold chain is beyond doubt.
Where does the novel coronavirus in the cold chain come from?
On January 8, 2021, Shi Zhengli and Zhou Peng, researchers from Wuhan Institute of Virology, Chinese Academy of Sciences, published an article titled “Novel Coronavirus Cross-population Transmission” in Science.
The direct source of the Covid-19 pathogen has not yet been determined worldwide.
This more than a year, the novel coronavirus was detected on the reported cold chain product, most is on the outer package of imported frozen fresh, among them “in the gun” most is aquatic product, be like South American white prawn.
But there is no clear conclusion as to where the viruses in these packages came from.
It is only judged that droplets may be contaminated with infected persons, that is to say, it may be human-to-human transmission.
If the outbreak is not over in the producing country, especially the place of production, the risk of cold chain workers being infected is high and the risk of food surfaces being contaminated by workers is high.
Food production and processing is a labor-intensive industry, especially when it comes to cold chain packaging and transportation, and not all the work can be done by machines.
At present, in many areas of foreign countries without basic control of the epidemic situation, if the source of contamination is not cut off, will continue to detect the positive virus in frozen food and packaging.
So, can you still buy cold chain food on the market?
What sources of food are safe to buy?
And then we go down.
Can you still buy cold chain food?
Of the more than 80 million confirmed cases globally, no infections caused by eating frozen food have been found so far, according to the “Food Safety and Health Rumors 2020 List” jointly released by the platform of the China Association for Science and Technology and the Chinese Society for Food Science and Technology.
That is to say, normal frozen food purchased from regular channels is edible.
Since the epidemic, the state has successively issued two legal standards to improve the management of “cold chain logistics” to a new level.
The positive detection of imported products and packaging also shows that China’s epidemic prevention and control measures are very strict and in place.
But not all of the novel coronavirus outbreaks have been linked to imported food.
The Hebei outbreak, for example, does not mention any link to imported food in any official reports.
On December 21, 2020, the Tariff Commission of the State Council issued the Notice of the Tariff Commission of the State Council on the Tariff Adjustment Plan in 2021.
Among the names of goods that have lowered tariffs, meat and seafood products are included, which fully shows that the vast majority of imported food is fine!
What else should we pay attention to in cold chain epidemic prevention?
There are requirements on the epidemic prevention guide of cold chain logistics: highway, waterway imported cold chain food logistics prevention and control should put the four “close”, namely: personnel close, tool close, information close and disposal close.
To effectively protect the health and safety of staff;
To participate in the cold chain process of all vehicles, containers, tools to carry out professional and thorough disinfection, cut off the source of virus transmission;
We should strictly implement the information registration system and strictly prohibit the transportation and sale of cold chain food from unknown sources.
We need to respond to emergencies and cut off transmission routes of the virus.
One is to do a good job in the purchase of protection, pay attention to wash hands, more disinfection;
Two is not to buy the source of unknown products;
Three is to pay attention to the key link in cooking health, need to cook all the ingredients.
Do the above points well, I believe that everyone can enjoy the food, in this unusual period, a warm, beautiful Spring Festival!
From the beginning of 2020 to the present, the new crown disease has been spreading wantonly around the world, especially in western countries, where the severity of the epidemic has been increasing.
For example, the current situation in the UK is very serious.
Covid-19 kills an average of 935 people every day in the UK, according to statistics from Oxford University’s research platform, Nanfang Daily reported recently.
The UK now has the world’s highest new-crowned death rate, and the top 20 are dominated by Western countries, including the US and Italy.
“The Great Reverse” in the West
Notably, in the first week of mid-January 2021, Covid-19 killed an average of 13,600 people worldwide every day.
This is a full 20 percent increase from the previous week.
As we all know, the outbreak in Europe started to get worse in October last year and has become the center of transmission in the world.
CoviD-19 kills about 869 people a day in the United States and more than 5,000 people in Europe.
If this trend continues, hundreds of millions of Europeans will die in the new pandemic.
More than 3.7 million cases have been confirmed and more than 100,000 deaths have been reported, according to the Department of Health and Social Care.
While the U.K. is better off than the U.S. in terms of current data, its mortality rate stands out for a larger population because Britain has a smaller population than the U.S.
CoviD-19 is now known to be the deadliest disease in the UK.
In the future, vaccines may not work
While the U.S. epidemic is not good either, with a cumulative death toll of more than 400,000, the U.S. epidemic is so bad because the U.S. is not taking action and the American people are not taking care of it, which are the two major causes of the spread of the epidemic in the United States.
However, compared with the US, the leading factor leading to the continued deterioration of the UK epidemic was the discovery of a new crown variant virus in the UK.
In addition, although the first outbreak in Germany, in the process to control infection rate and mortality in minimum range, but when the outbreak of the second, Germany then don’t stay up, the death toll has soared, which makes the crematorium shortage, memorial hall into a morgue, the body is not put, piled up so much on three floors.
In response to the current severity of the outbreak in Europe, the WHO had predicted that the new crown vaccine might not be effective in the future if the outbreak was not controlled.
As a result, countries around the world are now rushing to reach the goal of herd immunity.
More than 1,500 people have been confirmed infected with novel coronavirus after an outbreak of infection in 33 hospitals in Tokyo
Since the third wave of New Coronavirus in Japan in November 2020, more than 10 people have been infected in at least 33 hospitals in Tokyo. So far, more than 1,500 people have been confirmed infected with Novel Coronavirus.
In terms of the number of infections, three hospitals reported more than 100 cases and eight hospitals reported more than 50 cases.
On the other hand, 22 hospitals have fewer than 50 infected people, forming a medium scale, small collective infection.
On the 28th, Tokyo announced that 20 people had died from Covid-19 that day, the highest number of deaths in a single day since the outbreak began.
Israel said it found the California virus, the US delegates angrily demanded that the name be changed, the conference room burst into laughter
At a regular meeting of the WHO on January 25, Israeli experts said they had discovered a variant of the novel Coronavirus and named it the California virus, a claim that drew strong protests from U.S. representatives.
The American representative was very indignant and strongly demanded the name be changed, but the scene caused roars of laughter.
It is reported that Israeli experts said that the new novel coronavirus is determined to come from the US state of California at the earliest, so it will be named the California strain.
For the novel coronavirus study, Israel has been very serious, because the number of infected people in Israel has exceeded 550,000, such a number for the size of Israel, is absolutely a very surprising number.
After the study, Israel found not only the California strain, but also the Los Angeles virus in DNA tests.
There are not many taboos on virus naming, but it is rare to name a virus after a place unless it is known that the virus originated in the first place.
When novel coronavirus just broke out in China, the US side maliciously named the virus Wuhan virus or Chinese virus, hoping to belittle China in such a way.
However, various evidences show that the virus did not come from China, but from another source. Therefore, such action by the US side is fundamentally irresponsible.
After nearly a year, China’s domestic epidemic was basically under control, but the virus began to spread around the world.
So far, more than 25 million people have been infected in the United States and more than 10 million in India. The world is suffering from a severe outbreak, and the virus has mutated.
The novel coronavirus found in London is not the same as the normal novel coronavirus, so many countries named it the British virus, but this idea was strongly opposed by the UK.
More than 150,000 new infections are being reported every day in the United States, and the novel Coronavirus mutant virus has emerged in Chicago and California, which is why Israel named it that way.
However, such a naming method was also strongly opposed by the representatives of the United States, which believed that it was a smear of the United States.
However, what the United States and Britain did was to permit only state officials to set fire to the land and not allow the common people to light lamps.
Before the UK and the United States and other countries named the virus after our country or Wuhan, may feel very relaxed, because such practices have caused us a lot of trouble.
But now, by naming viruses this way, Britain and America are finally getting a taste of the same thing.
The fight against the epidemic is an important task for the whole world. Only through solidarity, can mankind defeat the virus.
Four Japanese nationals who returned from Brazil have been diagnosed with Covid-19, a variant of the virus, according to important news recently reported by Japanese media.
Through the study of this case, we can basically confirm that the source of the novel variant novel coronavirus from Japan has been found, that is, it comes from Brazil.
A new strain of novel coronavirus, the same type of mutant virus detected in Japan, has been discovered in Brazil’s Amazonian state, the Global Times reported.
Mutant virus found in Brazil, Japan
Since the UK confirmed the first mutated virus, many countries around the world have detected stronger mutated virus, in the space of a month, more than 50 countries found the same mutation found in the UK virus.
Following the discovery of the mutated virus in the UK, another mutated virus was detected in South Africa, then in Brazil and then in the United States.
The speed and invisibility of the mutated virus is more frightening than the original virus, and it is also more dangerous.
Status of epidemic prevention and control in Japan
Since last year, the outbreak has been severe in Japan, and the country has been banned several times to contain the epidemic, but the situation has quickly deteriorated after being relaxed.
This time, the mutation of the Brazilian virus is the same. After the mutation virus spread to Japan, the number of infected people in Japan rose rapidly, and the situation also deteriorated rapidly. The indicators all exceeded the previous, and even broke records.
And according to Japan’s National Institute of Infectious Diseases, the mutated virus could spread within the Japanese community.
In this context, the prime minister of Japan decisively issued a blockade of the state of instruction, the serious counties have been isolated, into the state of emergency, in order to deal with the serious epidemic again.
Japan has also restricted travel and entry to 11 countries and regions, related personnel are prohibited from traveling, and the review of Japanese people entering and leaving the country is more strict. In order to protect Japan’s own environment and contain the epidemic situation in Japan, such a decision was made.
Facts have proved that the adoption of such a decision is conducive to Japan’s epidemic prevention work, which can reduce the number of foreign cases and focus more on the domestic epidemic control.
Be careful with mutated viruses
In the international community, the epidemic is still serious, the epidemic does not know what kind of variation will occur.
In the case of the Brazilian variant, it has yet to be identified, but the emergence of the virus has proved more difficult in the Amazonian state of Brazil, which has sought international help.
With the frequent occurrence of mutated viruses around the world, China has attracted the world’s attention as one of the few countries in the world that has excelled in combating the epidemic.
As a country across the sea from Japan, China should also pay attention to the epidemic in Japan, strengthen entry audit, and prevent the aggravation of the domestic epidemic.
On January 22, according to the Jiangsu Province Wuxi Liangxi District Center for Disease Control, an imported cherries inside surface nucleic acid test positive, through the collection of environmental, articles, personnel specimens 199, the test results are negative.
After the news came out, # wuxi an imported cherries surface tested positive # immediately rushed to the hot search with anxiety.
Coincidentally, on January 14, three samples of imported ice cream bars in Tianjin were also tested positive. Frequent news made cold chain food questioned again:
The cherries have the virus?
Can you still buy cold chain imported food?
If accidentally eat this kind of food, whether can infect the virus?
In that case, what can we do with our food?
First, the conclusion: there’s no need to panic about a positive nucleic acid test for a food. Buy a good cherries and don’t throw them away.
Next, we ask experts to talk specifically about XX food nucleic acid test positive in the end what is going on?
What does this information mean?
1 food nucleic acid test positive why suddenly become more?
In the recent period of time, the number of positive nucleic acid tests in imported goods is more than before, which is actually a normal phenomenon, which is mainly related to two reasons:
Many countries are still in the midst of a COVID-19 outbreak, with a large number of new cases occurring every day.
China entered winter, low temperature will prolong the survival time of the virus.
Not only novel coronavirus, many viruses are cold resistant, heat resistant, very cold resistant.
Studies have shown that novel coronavirus has been stored at 4 °C for 14 days with almost no inactivation.
In addition to physical conditions, whether it is seafood processing plants, trade and logistics stations, or fresh markets, these places are relatively closed, low temperature and humidity, crowded, full of physical labor and deep breathing brought by Shouting, more conducive to the spread of the virus.
But don’t panic. That doesn’t mean a variety of foods can spread novel coronavirus.
Detects positive of 2 food nucleic acid, can you infect a person?
Don’t worry too much.
On the one hand, there is no conclusive evidence of novel coronavirus transmission through the digestive tract.
On the other hand, having a positive nucleic acid test, and being infectious, are two different things, and that has to do with how nucleic acid testing works.
A complete virus consists of an outer protein shell and a nucleic acid (DNA or RNA) inside. We seldom detect viruses directly now because of the very complex equipment (electron microscopy, etc.) that can only be done in a few laboratories.
We often use cheaper and easier nucleic acid tests to determine whether a person is infected with a virus.
The most commonly used method is RT-PCR, which detects viral nucleic acids by amplification of nucleic acid fragments.
Simply put, as long as there is a fragment of viral nucleic acid, can be tested positive, does not mean that there is a complete, live virus.
For example, after the patient is cured, the live virus is cleared by the immune system, but the nucleic acid fragments of the virus may still exist in the body, so some patients may still show positive nucleic acid test after a period of time after discharge, but it does not mean that there is complete viral nucleic acid in the body, let alone the presence of live virus.
For example, the virus might stick to the surface of some long-haul cold-chain cargo, allowing it to travel across borders.
But unlike bacteria, which can survive independently, viruses must replicate inside host cells. There is no host cell on the surface of these goods that Novel Coronavirus can replicate, so the virus will gradually break down and lose its vitality.
It’s like after the crash we can find pieces of the plane on the ground, but the plane itself is broken up.
At one extreme, DNA can be preserved for hundreds of thousands of years in some frozen fossils, but the organism itself may have long since become extinct.
Novel coronavirus to be infectious, must have two characteristics, live virus + viral load is high enough, both cannot be missing.
So just because the cherries have positive nucleic acids on their surfaces doesn’t mean they’re infectious.
Later test results also confirmed this point, the detection personnel collected a total of 199 environmental, articles, personnel samples, test results are negative, indicating that the surface of the nucleic acid detection of the cherries, did not cause human infection.
Of course, if you’re really worried, eat a different fruit.
3 Imported food
Especially cold chain imported food is still edible?
On the whole, it is reassuring.
From the actual statistical data, cold chain food detection of novel coronavirus nucleic acid positive probability is still very low.
According to the news released by the press conference of the joint prevention and control mechanism of the State Council in November last year, the positive rate of sampling inspection of imported cold chain food across the country was 0.048%, and it was mainly concentrated on the outer package of food.
Relevant departments are very strict in the control of imported cold chain food. At present, imported cold chain food is not allowed to be marketed without nucleic acid test report.
According to the Chinese Center for Disease Control and Prevention, there have been no known cases of Covid-19 infection from eating imported cold-chain food.
So for ordinary consumers, there is no need to panic too much.
Of course, if you’re really anxious, you can always choose locally produced food during an outbreak.
4 Special times
How to handle food at ease?
In fact, no matter have epidemic situation, we do a good job of daily protection is still necessary, because the bacterial contamination of food appears the probability of health problems, actually bigger than the infection of novel coronavirus itself.
Even if you unknowingly buy a potentially risky product, don’t worry too much: Reheat is best, and only eat raw fruit. If you’re really worried, rinse it under water for a while, or use a fruit and vegetable cleaner.
Novel coronavirus, like most viruses, has an Achilles heel: a fear of heat.
A virus is essentially a protein shell containing a small amount of genetic material.
Heating denatures proteins and inactivates genetic material, thus killing the virus.
Heating to 56 °C and holding for 30 minutes will kill a novel coronavirus, boiling it faster.
You can minimize the risk of eating the virus by paying attention to the following tips when shopping and cooking:
Rinse fresh food carefully;
Fruits, vegetables, meat separately processed, raw and cooked food chopping board and knives should also be separated;
Cooking the ingredients that need to be heated can also prevent bacteria and parasites.
Wash your hands carefully before and after handling ingredients.
Winter is coming, the epidemic has been repeated, and there have been a lot of new positive news recently. At this time, it is more important not to believe rumors and respond scientifically. After all, we have just overcome one winter like this, and we will overcome the second one.
Novel Coronavirus Traceback to the “Timeline” : Many European and American countries have appeared in the autumn of 2019
The World Health Organization (WHO) International Expert Group on Novel Coronavirus Traceability visited China on January 14, and conducted joint scientific research cooperation with Chinese scientists on Novel Coronavirus Traceability.
Foreign Ministry spokeswoman Hua Chunying said at a regular press conference on January 18 that the issue of the origin of the new crown is a very serious scientific issue that should be drawn by scientists and medical experts based on facts.
In fact, since May 2020, there have been multiple authoritative media reports, scientific studies show that novel coronavirus has been in existence in many places around the world at least since the fall of 2019.
Reuters: Volunteers in Italy were infected with novel coronavirus in September 2019
Novel coronavirus has been circulating in Italy since September 2019, according to a study by the National Cancer Institute in Milan.
The first COVID-19 patient in Italy was detected on 19 February 2020 in a town near the city of Milan in the northern Lombardy region.
But researchers in Italy found that 11.6 percent of 959 healthy volunteers screened for lung cancer between September 2019 and March 2020 had developed antibodies against Novel Coronavirus by February.
Their findings are published in the Journal of Oncology, the scientific journal of the National Cancer Institute.
One of the authors of the study, Giovanni Appolone, told Reuters that the study showed four cases dating back to the first week of October 2019.
The cases showed antibodies to Novel Coronavirus, meaning they were infected in September.
Italian researchers told Reuters in March 2020 that they found more severe pneumonia and flu cases than usual in the Lombardy region in the last quarter of 2019, suggesting that the novel coronavirus may have spread earlier than previously thought.
EFE: Novel coronavirus was detected in Brazilian wastewater samples in November 2019
According to a report by EFE on July 2, 2020, Novel Coronavirus was found in the sewers of Florianopolis, the capital of the Brazilian state of Santa Catarina, as early as November 2019, according to a preliminary study conducted by the Federal University of Santa Catarina in Brazil and the University of Burgos in Spain.
That is three months before the first case was confirmed in Latin America.
The first case of COVID-19 was confirmed in Brazil on 26 February 2020, which is the first case of COVID-19 in Latin America.
Novel coronavirus was found in two samples collected from the Florianopolis sewer wastewater on November 27, 2019, researchers at the Federal University of Santa Catarina said in a release.
The study analyzed samples of frozen water from sewers taken between October 2019 and March 2020.
Novel coronavirus was detected in water samples of November 27, 2019, and increased viral load was found in subsequent analysis of two sets of samples (December 11, 2019, and February 20, 2020).
That suggests that novel coronavirus was circulating in communities months before the first cases were reported in Latin America, according to the study, published online in the Archives of Medical Papers.
The team had “some doubts” about the original results, so they repeated the test and successfully traced the novel coronavirus genome, study co-author Gislena Fonggaro said in a press release.
“Out of caution, we used more than one viral marker to confirm this,” the researcher said.
“If you consider that it takes 15 to 20 days for the virus to cause an acute infection…
Then the obvious conclusion is that novel coronavirus spread early in human populations.”
La Repubblica: An Italian child carries Novel Coronavirus in November 2019
According to a report of La Repubblica on December 9, 2020, a team of researchers at the University of Milan reported that novel coronavirus was found in a 4-year-old child’s throat secretion extracted in early December 2019, which means that novel coronavirus may have spread in Italy as early as mid-November 2019.
On November 30, 2019, a four-year-old boy living in the city of Milan was reported to have been taken to the emergency room of a local hospital with symptoms including respiratory discomfort and vomiting.
The next day, the boy developed measles – like spots.
On December 5, 2019, the boy’s throat swab was tested for measles virus and the sample was retained as required.
Researchers at the University of Milan studied and analyzed throat swab samples retained from 39 rash cases in Milan between September 2019 and February 2020. Of these, 38 samples tested negative for novel coronavirus, while the 4-year-old boy’s throat swab sample tested positive and isolated the strain.
According to a retroactive analysis of a throat swab sample taken from a 4-year-old boy, the boy was infected with novel coronavirus four to five days before he developed respiratory symptoms, according to one of the study’s authors, Jos Bianchi.
The boy and his family have no history of travelling abroad.
RIA Novosti: In November 2019, there were 110 suspected new crown cases in Italy
According to a report by RIA Novosti on 30 June 2020, health authorities in the Italian province of Bergamo have found 110 suspected cases of Covid-19 in the city of Alzano Lombardo, in the province, between November 2019 and February 2020.
As of the end of 2019, a total of 40 patients in Alzano Lombardo had been hospitalized with an “unknown virus,” Italian newspaper La Repubblica reported, citing information from the regional prosecutor’s office in the province of Bergamo.
The newspaper noted that because of the Italian Ministry of Health’s protocol, testing for novel coronavirus was not conducted immediately after the outbreak was declared in China.
The Associated Press also reported this story on July 1, 2020.
There is evidence that the novel coronavirus may have spread in northern Italy as early as November 2019, the report said.
Earlier this month, Italy’s National Institute of Health reported that a study had found traces of novel coronavirus in Milan and Turin as early as December 18, 2019, two months before Italian officials announced the first confirmed cases of the virus.
Spanish newspaper El Pais: In December 2019, Italian wastewater samples had Novel Coronavirus
According to a report on the website of the Spanish newspaper El Pais on June 20, 2020, Novel coronavirus reached Italy as early as mid-December 2019, according to a study published by the Italian Institute of Higher Health.
The study analyzed 40 waste water samples collected between October 2019 and February 2020 from cities including Turin, Milan and Bologna, and detected the presence of novel coronavirus in 14 of them.
The results seem beyond doubt, as they have been confirmed by two different laboratories using different analytical methods.
The presence of novel coronavirus was detected in Milan and Turin wastewater sampled on December 18, 2019, and in Bologna wastewater sampled on January 29, 2020.
Novel coronavirus was also found in January and February 2020 wastewater samples from those cities, while samples from October and November 2019 showed negative results.
Reuters: A Covid-19 patient was admitted to France in December 2019
A French hospital re-examined old samples from a pneumonia patient and found that a man with Covid-19 had been admitted to the hospital on December 27, 2019, nearly a month before the French government confirmed the first case.
Yves Coen, head of the intensive care unit at the Avisennes and Jean-Verdier hospitals in the northern suburbs of Paris, told the media that researchers reexamined samples from 24 patients admitted in December 2019 and January 2020, when they tested negative for the flu virus.
Of those 24, one patient admitted Dec. 27 tested positive for Novel Coronavirus, Dr. Coon said.
The hospital initially took the samples to test for influenza by polymerase chain reaction (PCR), a test procedure that can also be used to test patients for novel coronavirus infection when they were sampled.
In December 2019, novel coronavirus was found in blood samples donated in the United States
According to a new study, Covid-19 may have arrived in the United States as early as December 2019, before the disease was even identified in China.
Researchers from the U.S. Centers for Disease Control and Prevention (CDC) analyzed more than 7,000 blood donor samples collected by the American Red Cross on December 13, 2019, solstice on January 17, 2020 in nine states, and 106 of them tested positive for the Novel Coronavirus antibody.
The study was published in the American Journal of Clinical Infectious Diseases.
The findings suggest that “novel coronavirus cases may have been present in the United States as early as December 2019, earlier than previously thought,” the authors said.
Antibodies against other coronaviruses may “cross react” and present a positive result.
But when the researchers ran more tests to figure out such cross-reactions, they found that 84 of the 90 samples tested had antibodies specific to novel coronavirus.
Overall, the finding “results in a very small probability of false positives in all the responding samples,” the authors said.
In other words, at least some of the positive samples collected between December 2019 and January 2020 were likely the result of previous exposure to novel coronavirus.
Brazil reveals important clue to virus, experts: no surprise.
Since will be coronavirus in early 2020, many countries are haunted by the virus, many people are very interested in the matter of virus source, but even after the who and many a year after the study of the truth about the source, is still a mystery, but it is great that, even if it did not find out the truth of the year, in the survey also found clues about the source, the Italian experts had a cancer in their samples found in 111 cases were positive for the virus, January 20, according to foreign media reports, Brazil recently about the virus source event, and have new discovery,
And the finding has experts saying it’s not surprising.
The Brazilian expert said the source of the novel coronavirus was likely multiple countries.
An examination of serum samples from a Brazilian state in 2019 found 210 of the 7,370 samples tested positive for the virus, but there is no clear answer as to where the virus came from.
It is worth mentioning that among all the positive samples, the earliest one was on December 18, 2019, which was apparently far earlier than the first case of the virus found in China.
Novel coronavirus is known to take time from infection to detection, and once the Brazilian virus is confirmed, it would mean that the case of the virus’s origin has moved forward again.
It is reported that experts such as Italy and Germany have studied cases of source of novel coronavirus before this.
Tests on serum samples in Italy found that a woman was most likely infected as early as October 2019, and German experts have previously said that novel coronavirus can be traced back to northern Italy.
In addition to Italy found positive samples, Spain’s a sewage report, there are positive for the virus has been identified, but more importantly, the sewage sampling is in March 2019, and this time even longer time than Brazil and Italy, is also the earliest date will be coronavirus samples.
Since China reported the case of the World Health Novel Coronavirus, the United States and other Western countries have been trying to pin the “source of the virus” on the Chinese side.
The analysis pointed out that with the continuous tracing by WHO and other countries, the truth will eventually come to light. WHO also said that the purpose of tracing is to promote the research and development of vaccines and the global fight against the epidemic, rather than to hold any country or region responsible.
In addition to tracing the source of work, the most important at present is each country can unite as one, fight epidemic jointly, only after novel coronavirus is controlled, ability is in achieving economic recovery, ability lets each country develop no longer be restricted……
According to local German media reports on the 18th, 73 patients and medical staff in a hospital in Garmisch-Partenkirchen, Bavaria, Germany were diagnosed with the new crown pneumonia virus, of which 35 were infected with a new variant virus.
This virus is different from mutated viruses previously found in the UK, South Africa and Brazil. It is still unclear whether this new variant virus is particularly infectious.