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Original: Zhong Kai
The new crown epidemic in Xinfadi in Beijing has gradually disappeared, salmon has been "recovered", and Japanese food has returned to the hustle and bustle of the past
.
However, recently the Beijing Center for Disease Control, Beijing Preventive Medicine Research Center, Chinese Academy of Medical Sciences, Chinese Academy of Sciences and other units jointly published a paper.
They believe that salmon is not injustice!
.
However, recently the Beijing Center for Disease Control, Beijing Preventive Medicine Research Center, Chinese Academy of Medical Sciences, Chinese Academy of Sciences and other units jointly published a paper.
They believe that salmon is not injustice!
Gossip less, just focus on the key points
.
.
Booth S14, Seafood District
The Xinfadi beef and mutton hall was the center of the epidemic.
There is no doubt about it, but where is it in the hall? According to epidemiological investigations, stall S14 in the seafood area is most suspected
.
All 7 employees were infected, and the onset time was relatively early
.
There is no doubt about it, but where is it in the hall? According to epidemiological investigations, stall S14 in the seafood area is most suspected
.
All 7 employees were infected, and the onset time was relatively early
.
Five people were screened from the infected customers.
Both IgG and IgM were positive.
The intersection of them in Xinfadi is booth S14
.
(IgM means the infection time is relatively early)
Both IgG and IgM were positive.
The intersection of them in Xinfadi is booth S14
.
(IgM means the infection time is relatively early)
These 5 people all went to the new place on May 30/31 and have not been there since
.
.
The following heat map is more intuitive, the red ball is S14
.
.
Europe
Beijing has been calm for 2 months, and the staff at the S14 stall in the seafood area have no way to contact people infected with the new crown or close contacts.
Where did the virus come from? The virus mutates quickly and is random, which means that its evolution and transmission process can be "rechecked" based on the difference in gene sequence
.
Where did the virus come from? The virus mutates quickly and is random, which means that its evolution and transmission process can be "rechecked" based on the difference in gene sequence
.
Genetic testing has locked a characteristic mutation site numbered C12085T.
The virus carrying this mutation is likely to be the source of the new outbreak
.
By comparing virus gene sequences, scientists further believe that the virus is not domestic, it is likely to come from Europe!
The virus carrying this mutation is likely to be the source of the new outbreak
.
By comparing virus gene sequences, scientists further believe that the virus is not domestic, it is likely to come from Europe!
Chilled salmon
There is only one imported item at the S14 stall in the seafood area, which is chilled salmon
.
Investigators collected 3582 sealed salmon samples stored in cold storage (not in the new location), and found that 6 fish samples were positive, 5 from the same company, and one of the unopened fish samples had virus sequence and The sequences of viruses in new outbreaks are highly similar
.
.
Investigators collected 3582 sealed salmon samples stored in cold storage (not in the new location), and found that 6 fish samples were positive, 5 from the same company, and one of the unopened fish samples had virus sequence and The sequences of viruses in new outbreaks are highly similar
.
This company is the supplier of the S14 booth, and the source of the goods is a country with the new crown epidemic
.
The paper did not disclose which country it was from, but the chilled salmon from Europe is likely to be Norway or Denmark
.
.
The paper did not disclose which country it was from, but the chilled salmon from Europe is likely to be Norway or Denmark
.
The stall owner of S14 had purchased the goods on May 30 and split the sale at the stall that day, and the earliest infected customer happened to arrive at Xinfadi on this day
.
.
Although Beijing has not isolated a live virus from salmon, scientists speculate that the source of the new outbreak is chilled salmon
.
In addition, the Chinese Center for Disease Control and Prevention has isolated live viruses from frozen cod packaging in Qingdao not long ago, and the evidence of cold chain transmission is becoming clearer and clearer
.
Recent studies have found that under refrigeration and freezing conditions, the infectivity of the new coronavirus on chicken, pork, and salmon can be maintained for 21 days without attenuation.
.
.
.
In addition, the Chinese Center for Disease Control and Prevention has isolated live viruses from frozen cod packaging in Qingdao not long ago, and the evidence of cold chain transmission is becoming clearer and clearer
.
Recent studies have found that under refrigeration and freezing conditions, the infectivity of the new coronavirus on chicken, pork, and salmon can be maintained for 21 days without attenuation.
.
.
Whether imported cold chain food can be bought or eaten, I currently have the following opinions for your reference
.
.
1.
From the perspective of the possibility of cold chain food infecting people, it now appears that this is not a "theoretical possibility" but has actually happened
.
Of course, considering the daily mass consumption frequency in China, this probability is really very low
.
From the perspective of the possibility of cold chain food infecting people, it now appears that this is not a "theoretical possibility" but has actually happened
.
Of course, considering the daily mass consumption frequency in China, this probability is really very low
.
2.
Imported cold chain food may be contaminated by the virus either in the outer packaging or inside the packaging
.
Even if the customs does batch testing, it cannot guarantee 100% safety because it is impossible to disassemble every package for testing.
There is a possibility of negative on the outside and positive on the inside
.
Of course, with customs control, the probability of the virus slipping in will be much lower
.
Imported cold chain food may be contaminated by the virus either in the outer packaging or inside the packaging
.
Even if the customs does batch testing, it cannot guarantee 100% safety because it is impossible to disassemble every package for testing.
There is a possibility of negative on the outside and positive on the inside
.
Of course, with customs control, the probability of the virus slipping in will be much lower
.
3.
In addition to chilled sashimi, most imported cold chain foods still need to be further processed (heated) before being eaten, so paying attention to operational hygiene should further reduce the inherently low risk of virus infection
.
In fact, the main thing is to wash your hands frequently and not to touch your mouth, nose and eyes
.
In addition to chilled sashimi, most imported cold chain foods still need to be further processed (heated) before being eaten, so paying attention to operational hygiene should further reduce the inherently low risk of virus infection
.
In fact, the main thing is to wash your hands frequently and not to touch your mouth, nose and eyes
.
4.
There is no absolute safety in the face of a very hidden and contagious virus
.
But relatively speaking, the risk of consumers is much smaller than that of cold chain practitioners, and the probability of infection is indeed very, very low
.
It may be the local official in charge of epidemic prevention and control who cannot accept any risks
.
My own choice is business as usual, eating and drinking
.
Immediately on Double 11, if there is a suitable one, you can also stock up a little
.
Of course, if you decide not to buy imported cold chain food, there is no problem.
After all, no imported cold chain food is indispensable and irreplaceable
.
There is no absolute safety in the face of a very hidden and contagious virus
.
But relatively speaking, the risk of consumers is much smaller than that of cold chain practitioners, and the probability of infection is indeed very, very low
.
It may be the local official in charge of epidemic prevention and control who cannot accept any risks
.
My own choice is business as usual, eating and drinking
.
Immediately on Double 11, if there is a suitable one, you can also stock up a little
.
Of course, if you decide not to buy imported cold chain food, there is no problem.
After all, no imported cold chain food is indispensable and irreplaceable
.
5.
Domestically produced cold chain foods can be consumed with confidence
.
Be careful not to buy imported cold chain foods that are too cheap and from unknown sources, because there may be a problem of smuggling
.
This is a hidden danger of imported epidemics that the regulatory authorities are reluctant to say, and it is difficult to prevent the epidemic
.
Domestically produced cold chain foods can be consumed with confidence
.
Be careful not to buy imported cold chain foods that are too cheap and from unknown sources, because there may be a problem of smuggling
.
This is a hidden danger of imported epidemics that the regulatory authorities are reluctant to say, and it is difficult to prevent the epidemic
.
