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Original title: A 23-year-old international student became the first case of a new variant of British infection in mainland China
Relevant departments in Shanghai have taken a number of measures, including strengthening monitoring of close contacts of patients and implementing comprehensive disinfection of specific patient-related locations.
Beijing News reporter Luan Ruoxi
According to news from the CCTV news client, recently, the Shanghai Municipal Center for Disease Control and Prevention tracked genetic sequencing of confirmed cases of novel coronary pneumonia imported from the UK and found that the genetic sequence of the novel coronavirus in one case it was of subtype B.1.1.7, which was similar to the recent UK one. The mutant virus genes reported are similar.
Xu Wenbo, director of the Institute of Viral Diseases at the Chinese Center for Disease Control and Prevention, responded in an interview with reporters that there is no difference in pathogenicity, severity or lethality between the current variant of the new coronavirus and the older variant, and pathogenicity has not changed significantly. panic.
▲ The gene sequence of an imported case in Shanghai was similar to that of the mutant virus reported in the UK. Our video produced by Beijing News (ID: wevideo)
The patient removed his mask to eat and drink while waiting to board the plane.
The CDC report noted that on December 14, 2020, a 23-year-old woman who flew to Shanghai from the UK received a nasal swab at the Shanghai Customs Laboratory. At 8:30 p.m. that day, the Shanghai Municipal Center for Disease Control and Prevention received a notification from Shanghai Customs that the woman tested positive for the new crown. At 10:00 p.m., the patient was transferred from the isolation point to a fever clinic at the Jiading District Central Hospital, Shanghai. Due to the patient’s travel history in the UK and abnormal nucleic acid test results, the hospital arranged an expert consultation and transferred the patient to the Fudan University Affiliated Public Health Clinical Center for diagnosis and treatment. the next day. On December 15, the Jiading District Disease Control Center re-examined the patient’s nasopharyngeal swab and the nucleic acid test was positive.
The report noted that on December 12, 2020, the patient’s new crown test result was negative. Based on my description, she has not had any contact with any symptomatic individuals, has not purchased or been exposed to frozen food or raw meat. However, he did not wear a mask while running in an English park, and he removed the mask to eat and drink while waiting to board the plane.
According to epidemiological investigation, the patient was diagnosed as mild. On December 24, when the patient’s sample (Sequence ID: NC20SCU2740-1) was genetically sequenced, the strain was found to be different from the strain previously detected in Shanghai, indicating a different route of transmission. After further investigation, the patient was found to carry a new variant of the virus previously discovered in the UK, and the variant was named VOC 202012/01 (it was named VUI-202012/01).
▲ The Chinese Center for Disease Control and Prevention released a research report Screenshot from CDC China websiteThe CDC report noted that the NC20SCU2740-1 strain found in Shanghai is the first VOC 202012/01 strain imported into mainland China, posing a huge potential threat to the prevention and control of the new pneumonia epidemic. crown in China.
The report noted that the airport has implemented closed-loop management for passengers and investigations into close contacts have also been initiated. Close contacts include other passengers in the same row as the patient and within the three-row seating range, and flight attendants who provide cabin services. Furthermore, since the medical personnel at the isolation point and the central hospital have adopted effective personal protection measures, they are not considered close contacts. Other possible close contacts are also being investigated, and specific sites related to the patient are also being fully disinfected.
▲ Shanghai reported the first case of infection with a new variant of the new coronavirus. Screenshot of the “China Daily” reportAccording to “China Daily” reports, in order to minimize the risk of transmission, the Shanghai authorities have taken steps to trace close contacts of patients. With the new corona pneumonia epidemic under effective control, the importation of viruses remains a major risk for the prevention and control of the epidemic in China. In recent months, China has taken severe measures to prevent the virus from passing through incoming passengers and cargo.
The Shanghai Centers for Disease Control and Prevention released the latest notification, confirming that the genetic sequence of the novel coronavirus in one case was similar to the mutant virus gene recently reported in the UK. The patient is an international student of Chinese nationality, she is currently being treated in isolation at the Shanghai Public Health Clinical Center and her condition is stable. All of the patient’s passengers on the same flight were required to implement observation and isolation measures for 14 days, and no abnormalities were reported during the isolation period.
China Centers for Disease Control: The pathogenicity of new coronavirus variants found in the UK has not changed significantly
According to CCTV news client news, recently the Shanghai Centers for Disease Control and Prevention tracked genetic sequencing of confirmed cases of novel coronary pneumonia imported from the UK and found that the genetic sequence of the novel coronavirus in a The case was subtype B.1.1.7, which was similar to that of the recent UK. The mutant virus genes reported are similar.
Xu Wenbo, director of the Institute of Viral Diseases at the Chinese Center for Disease Control and Prevention, agreed to an interview with a reporter from Central Station.
1. Has the spread of the mutant strain found in Shanghai increased among the population?
The results of genetic testing of the mutant strains found in Shanghai indicate that the mutant strains have improved cell infectivity, but their spread between humans is closely related to human social activities, winter weather, and population self-protection measures.
2. Has the virulence and severity of this mutant increased?
At present, there is no difference in pathogenicity, severity, or case fatality rate between the new mutant strain of coronavirus and the previous mutant strain, and the pathogenicity has not changed significantly, so there is no need to panic.
3. Does China’s new corona vaccine have a protective effect on mutant strains?
At present, the new variant strain of the coronavirus has not been found to have an impact on the immunological efficacy of the new inactivated coronavirus vaccine marketed in China.
4. Can nucleic acid detection reagents for China’s new corona vaccine detect variant strains?
At present, the main nucleic acid diagnostic reagents in China target the dual target genes of the novel coronavirus, the N gene and the ORF1ab gene. Mutation of the protein gene does not affect the sensitivity and specificity of the nucleic acid reagent. The Shanghai variant is detected by the domestic nucleic acid reagent.
5. Are existing measures in China effective to prevent and control the spread of the new coronavirus?
China blocked the spread of the new local coronavirus in April. After that, more than 10 clusters of novel coronavirus pneumonia caused by imported cases or contaminated elements of the cold chain have taken effective steps to stop the spread. Regular screening of high-risk groups, early diagnosis, early treatment, early isolation from close and infected contacts, wearing masks, frequent hand washing, and maintaining social distancing are effective measures to block the spread of the new coronavirus in China.
6. What other measures should be taken in response to the emergence of mutant strains of the new coronavirus?
People don’t have to panic. You must strictly implement the prevention and control measures existing in our country. It is necessary to strengthen the awareness of personal protection, especially to strengthen the protection of medical personnel and professionals in designated isolation hospitals or hotels with imported cases.
The WHO officially notified the 4 new variants of the coronavirus
Since the outbreak of the new corona virus, the WHO has received several reports about the mutation of the new corona virus. The WHO periodically assesses whether the new variants of the new coronavirus will cause changes in its infectivity, clinical manifestations and severity of the disease. On the night of December 31 local time, the World Health Organization officially notified the four variants of the new coronavirus.
From late January to early February 2020, the new corona virus D614G mutation appeared, and this variant gradually replaced the originally discovered strain. By June 2020, this variant has become the main type of transmission of the new coronavirus worldwide. Compared to the parent strain, this variant has higher infectivity and transmission capacity, but will not cause more serious disease or affect the effectiveness of existing laboratory diagnostics, treatment methods, vaccines, and public health measures. .
▲ New variants of the new coronavirus were notified by the WHO Screenshot of the WHO official websiteFrom August to September 2020, a variant of the new mink-related coronavirus was discovered in Denmark and named “Cluster 5”. Related evaluations are still ongoing. At present, Denmark has only found 12 cases of patients infected with this variant in September, and the variant has not spread widely.
On December 14, 2020, the United Kingdom informed the WHO about a variant of the new coronavirus called VOC 202012/01. As of December 30, the variant has been found in 31 other countries and regions in five of the six WHO regions.
On December 18, 2020, a new variant of coronavirus was detected in South Africa. South Africa named it variant 501Y.V2. Preliminary studies have shown that this variant is related to a higher viral load and may increase infectivity, but there is no evidence that it can cause more serious illness. As of December 30, the variant had been discovered in four countries except South Africa.
Some news sources CCTV news client
