On the afternoon of February 9th, the China-WHO Joint Expert Group on Novel Coronavirus Traceability held a press conference in Wuhan.
At the meeting, Liang Wannian, the Chinese leader of the joint expert investigation group, said that in the second half of 2019, there was no novel coronavirus cycle that had not been identified in Wuhan.
In the same period, more than 4500 early samples in Hubei were reviewed, and no relevant findings were found.
At the same time, there is no evidence that the virus was transmitted in Wuhan before December 2019.
The foreign leader of the joint team of experts, Peter, said the suggestion of a virus leak from the laboratory was highly unlikely and would not be studied in the future.
The coronavirus found in bats and pangolins is believed to be closely related to novel coronavirus, suggesting that it may be the host of novel coronavirus, Liang said.
But so far, the association is not enough to identify the viruses carried by these two animals as direct ancestors of novel coronavirus.
Bat-borne viruses are not direct ancestors of novel coronavirus
On February 9th, a press conference was held by the China-WHO Joint Expert Group on Novel Coronavirus Traceability.
Coronaviruses with novel coronavirus gene sequences were found in bats and pangolins, but the similarity was not enough to make it a direct ancestor of novel coronavirus.
Animals such as minks and cats are highly susceptible to novel coronavirus, suggesting that bats, pangolins, or weasels, cats, and other species may be potential natural hosts.
It is highly unlikely that the virus could be released from a laboratory
According to China Youth Net, at this conference, foreign expert Peter listed four hypotheses of novel coronavirus spread to human body.
Introducing the virus to humans through an intermediate host, where it infects animals close to humans and then infects them, is the most likely route.
In addition, it is more likely to infect people through the cold chain food channel.
He said the suggestion that the virus had leaked from the lab was highly unlikely and would not be studied in the future.
Novel coronavirus was once thought to have come from a laboratory virus leak and spawned conspiracy theories.
Members of the World Health Organization’s expert group on the origin of the virus arrived in Wuhan on January 14, and the quarantine ended on January 28.
After that, the WHO expert team visited South China seafood market, CDC, Wuhan Institute of Virology and other places for field investigation.
The joint research team includes 17 experts from China and 17 experts from other countries, including the World Health Organization and the World Organization for Animal Health, said Liang Wannian, Chinese leader of the joint expert investigation team.
He said the team, divided into three joint research groups, spent 28 days in Wuhan tracing the source of the virus.
How can novel coronavirus be introduced into South China seafood market
Environmental detection after the closure of the South China seafood market generally found that novel coronavirus pollution, especially aquatic products stalls, South China market may be introduced through infected people, contaminated cold chain products, animal products and other ways, but it is not yet confirmed.
No novel coronavirus was found in bats in Hubei Province and a large number of domestic and poultry and wild animals sampled and monitored in China. No evidence of the circulation of novel coronavirus in domestic and poultry and wild animals before and after the outbreak of the epidemic was found.
In December 2019, a certain scale transmission of novel coronavirus occurred in Wuhan population, with most cases concentrated in the second half of the month.
South China seafood market is one of the outbreak points of the new crown epidemic, and it is also a key place that attracted the attention of the disease control department in the early stage of the epidemic. However, the search and analysis of early cases showed that there were cases in the South China seafood market at the same time, there were cases in other places in Wuhan.
WHO: Discussions are under way with Chinese vaccine manufacturers for collaboration
According to CCTV News, at the regular press conference of COVID-19 held by WHO on February 8, local time, WHO chief scientist Sumia Swaminathan said that China has a variety of new crown vaccines under development and the WHO is in communication with Chinese vaccine developers.
Currently, WHO is evaluating vaccine materials provided by Sinopharm and Sinovac, and teams are in China to visit vaccine production facilities.
“We are encouraged to hear now that Chinese vaccine manufacturers are willing to provide 10 million doses of vaccine for the Covid-19 vaccine implementation programme in the next few months,” said Sumia Swaminathan.
Chinese vaccine manufacturers will discuss the terms of the COVID-19 vaccine implementation plan with WHO, based on criteria such as the WHO emergency use list.
Zhang Wenhong’s latest voice: this year to defend themselves
Zhang Wenhong, director of the Department of Infection at Huashan Hospital affiliated to Fudan University, gave advice to Shanghai TV on Feb. 8 for residents to enjoy a peaceful Spring Festival.
He said that last year, put forward the “fire prevention and theft prevention colleagues” advice, this year’s situation is to “protect yourself”, at the same time, to spend more time with their families, rather than to spend more time with “others.”
Zhang Wenhong said that last Spring Festival, the epidemic just began to spread, at that time the detection ability is not now strong, at that time node put forward the “fire prevention, theft and prevention of colleagues” proposal, in fact, said that “prevention of colleagues”, in fact, the real prevention is the density of the crowd.
This year’s epidemic prevention situation is different, is to prevent “themselves”.
For the most part this year, the environment is safe.
However, once there are a few isolated cases, there is a risk that one spark will burst into flames.
Therefore, this year, we need to “guard ourselves”. We need to make sure that our protection work is done at home and at the right place. That is to say, mask, wash hands and do not gather.