Immunity in a person who has had COVID-19 lasts up to 13 months after infection. A study at the Washington University School of Medicine in St. Louis (USA) also emphasizes the effect of vaccination after COVID-19 infection, because some patients under observation have very low antibody levels. In a study by Rockefeller University scientists (USA) who followed 63 people with COVID-19 in the spring of 2020. They found that antibodies are produced by recording B lymphocytes memory becomes more effective in neutralizing SARS-CoV-2. In addition, the researchers also found that “vaccination boosts immunity naturally developed by these people during infection, to the point where they can be protected against new variants appear”. Therefore, once infected with the virus and vaccinated against COVID-19, immunity will be created especially strong. Rosemary ( Femme Actuelle June 2021 )

COVID on 10/6 4 hours ago Directly Press F5 to update the latest content 29 minutes ago Bac Giang adjusts to social distance for Lang Giang district from 12 o’clock today Bac Giang Provincial People’s Committee has just decided to adjust the application of social isolation measures to social distancing for Lang Giang district from 12 am today, 10/6 until further notice. Thus, in the past 3 days in Bac Giang, 3 districts have changed their status to social distancing: Yen The, Luc Nam and Lang Giang. Lang Giang district applies social distancing from 12 o’clock on 10/6. When implementing distance, it is still necessary to stop meeting activities and events with more than 10 people in one room, not gather 5 or more people outside of offices, schools, and hospitals. People keep a minimum distance of 2 meters between people in public places. Festivals, cultural, sports, entertainment activities, business and service establishments (dining, entertainment, karaoke, massage) must still be suspended. The filial piety is organized but does not gather more than 20 people, encouraging people to organize simply and neatly, limiting the number of people to gather. Bac Giang province asked people to limit movement between localities, stop public transport, except for means of transporting goods. (Long Van) 2 hours ago Quarantining 7 people when detecting a case of COVID-19 who had been to Dai Phuoc golf course On June 10, Dong Nai Center for Disease Prevention and Control (CDC) said that it had traced and identified F1, F2 cases of COVID-19 cases who had played at Dai Phuoc golf course (Urban urban area for tourism). Dai Phuoc ecological calendar in Nhon Trach district). Previously, on May 27, a foreigner came to play golf at the golf course with the general director of a company in Nhon Trach district. The foreigner was later found to have COVID-19. Dai Phuoc Golf Course Through epidemiological investigation, the Dong Nai CDC said that this COVID-19 case was detected on June 8, originating from contact with a previous positive case on June 4. Although this person came to play golf from May 27, however, in principle, it must be traced back 14 days. The results of tracing investigation at the golf course have 7 F1, no F2 but are investigating F2 outside. Currently, these 7 F1s are in concentrated isolation, awaiting test results. In addition, at the company where the general manager plays golf, there are 27 cases of F2 who are isolated at home. (Manh Thang) Ha Tinh Department of Health said that this morning (June 10), this province continued to record two more positive cases of SARS-CoV-2 including: LHD.A (SN 2008, residing in Bac Ha ward, City). Ha Tinh) and PQH patient (SN 1972, Trung Hoa hamlet, Tan Lam Huong commune, Thach Ha district). According to epidemiological investigation, LHD.A patient on the afternoon of June 3 had a bath at a public bathing point managed by Loc Ha district. After the announcement of finding someone related to the above bathing point, the patient went to make a medical declaration and was taken to concentrated medical isolation at Thach Hung primary school on the morning of June 9. The functional sector has implemented a blockade of 5 points related to the two newly recorded cases. Currently, the patient has been sampled for testing and has tested positive for SARS-CoV-2. Patient PQH is the 4th member of a family with 3 previously announced positive mother and child positive for SARS CoV-2 (patient 9245, patient 9247, patient 9248). The patient has been isolated. After recording two more cases, the health sector set up 5 checkpoints to blockade the living areas of the two patients and conducted related F1, F2 investigation. Thus, up to now, Ha Tinh has recorded 16 cases of COVID-19. Currently, the functional sector is continuing to review and zoning related to patients to prevent the COVID-19 epidemic.

The hypothesis that the COVID-19 pandemic can originate from the Wuhan Institute of Virology is of great interest to the world. (Photo: CNN) Where is the “birthplace of COVID-19”? The laboratories at the Wuhan Institute of Virology are classified as the safest, or biosafety level 4 (BSL4). They are formulated to control dangerous bacteria and viruses that can cause serious diseases for which there is no cure or vaccine. The researchers here are all well-trained professionals and equipped with protective gear. “ The laboratory is equipped with an HVAC feeder system so viruses cannot escape through the exhaust, all wastes are treated with chemicals or high temperatures to ensure that no (pathogens) are still active. dynamic “, said Dr. Gregory Koblentz at George Mason University. In addition to the Wuhan Institute of Virology, there are still 59 similar scientific research institutions in the world. Meanwhile, there are no international standards specifying the level of safety, security and responsibility in the preservation of disease-carrying specimens at these facilities. The possibility of problems in these labs is entirely possible. This rate is even higher for the thousands of lower-level laboratories than the Wuhan research facilities scattered around the world. The laboratories at the Wuhan Institute of Virology are classified as the safest. (Photo: CNN) Man-made disaster A prime example of a disaster stemming from a laboratory accident is the human H1N1 virus. After the terrible pandemic of 1918, in 1977, the H1N1 epidemic once again leaked from the laboratories of the Soviet Union and China, then spread all over the world. In 2001, a mentally disturbed employee of a scientific laboratory in the US spread anthrax spores across the country, killing five people. In 2004, two Chinese researchers exposed to the SARS virus became the source of infection, one of the infected people died. In 2014, the US Food and Drug Administration discovered that some samples carried smallpox at risk of being released. Lynn Klotz, a senior fellow at the Center for Arms Control and Nuclear Nonproliferation, warned that scientific labs have posed many public health threats in history. history, and a similar situation is likely to repeat itself in the future. “ Human error accounts for more than 70% of laboratory incidents “, said Mr. Klotz. A prime example of a disaster stemming from a laboratory accident is the human H1N1 virus. Is Wuhan bat research dangerous? GOF research involves editing pathogens to make them more contagious, more dangerous, or easier to evade vaccines and treatments, all with the aim of improving measures against these pathogens. this disease. GOF has long been an area of ​​intense controversy. The US government, the largest funder of research on the link between COVID-19 and bats in Wuhan, disagrees with several independent scientists. They could not agree on whether this work should be classified as a GOF study. Epidemiologist Marc Lipsitch expressed concern about studying the SARS-CoV-2 virus in bats: I am afraid that it will create a new strain of virus that, although not deadly if infected by the laboratory staff, will cause a new pandemic.” . “ This research is unnecessary and does not contribute to drug or vaccine development ‘, said Professor Richard Ebright at Rutgers University, a longtime GOF expert. The US government also banned GOF research in 2014. The ban was relaxed in 2017, under which some cases will be considered to be allowed to operate based on the application of the research. However, the review process has been criticized as lacking transparency and unreliable. Leading US health experts Francis Collins and Anthony Fauci of the National Institutes of Health have denied the research on COVID-19 and Wuhan bats is of the GOF category, but independent scientists disagree with this. their statement. The US government is the largest funder of research on the link between COVID-19 and bats in Wuhan. (Photo: AP) There is currently no clear scientific evidence on whether the virus that causes the COVID-19 pandemic leaked from a laboratory. However, there is some indirect evidence in favor of this hypothesis: Wuhan is only about 1,600 km north of the bat cave containing the SARS-CoV-2 virus, scientists from Wuhan are also known to often frequent visits to bat caves to take samples. Alina Chan, an expert in molecular biology at the Broad Institute, said the SARS-CoV-2 virus does not grow quickly after infecting people. This is one of the signs that the virus came from the lab. Ms. Chan added that the research on the SARS-CoV-2 virus will not be abandoned even after the pandemic ends. On the contrary, this study can be further extended in the future.

On May 26, the Biden administration directed US intelligence officials to take a closer look origin of SARS-CoV-2 , including theories such as animal-to-human transmission and lab leaks. The SARS-CoV-2 virus has so far infected more than 172 million people globally and caused more than 3 million deaths. (Photo courtesy: AFP) To date, the most comprehensive look at the origins of Covid-19 is a report by the World Health Organization (WHO) published on March 30 by an international team of researchers who traveled to China to Investigate the origin of the SARS-CoV-2 virus. However, weeks later, many countries around the world have expressed concern that investigators have not had access to adequate data, while scientists say the report clearly shows how the virus develope. “The quick and obvious answer is not possible, as it normally takes years to trace the source of the virus. But in this case, I think we have enough evidence to make some hypotheses about SARS-CoV-2,” said Angela Rasmussen, a virologist at the Center for Global Health Science and Security at the Center for Disease Control and Prevention. Georgetown University Health, said. In the WHO report, the team found that it is possible that SARS-CoV-2 was transmitted from one animal to another before it was transmitted to humans. They also looked at evidence supporting the hypothesis that the virus was transmitted directly to humans from the original host animal, or that the virus spread through the frozen food supply chain. In addition, the research team said that the possibility that SARS-CoV-2 leaked from a laboratory in Wuhan (China) is “very unlikely”. Below are the evidences for each of the four hypotheses about the origin of SARS-CoV-2 that the WHO report makes. 1. Direct animal-to-human transmission WHO assesses direct transmission of SARS-CoV-2 from animals to humans as a “probable” possibility. The SARS-CoV-2 virus originated in an animal, possibly a bat, and then spread to humans. The WHO report provides evidence that the majority of coronaviruses that infect humans come from animals, including the virus that caused the 2003 SARS outbreak. Bats are thought to be the most likely animal to cause it. epidemics of Covid-19 because they are hosts of a virus that is genetically related to SARS- CoV-2. The WHO report acknowledges the possibility that SARS-CoV-2 spread to humans from pangolins or ferrets. However, David Robertson, a virologist at the University of Glasgow, said that the WHO team of scientists had sampled many animals other than bats for study, and the analysis showed that bats are a natural reservoir for the virus. SARS-CoV-2. 2. Transmission from animals to humans through an intermediate host According to WHO, the possibility of SARS-CoV-2 transmission from animals to humans through an intermediate host is very high. In the event that SARS-CoV-2 was not transmitted directly from bats to humans, the scientists believe the most likely hypothesis is that the virus first spread through another animal species, such as a ferret or ferret. pangolin. Unlike bats, these animals are in constant contact with humans, especially if they are raised on farms or during the illegal wildlife trade. If SARS-CoV-2 was initially transmitted to another animal, that could also explain how the virus adapted to harm humans, although Robertson said the virus probably won’t change much. Genome analyzes show that SARS-CoV-2 is a virus specifically adapted to humans, which explains why it can be easily transmitted between pangolins, ferrets, cats and other species. other animals. The WHO report indicates that this is the route that previous corona viruses have taken to infect humans. For example, the SARS virus is believed to have passed from bats to civets before causing an epidemic in humans in 2002. Meanwhile, the virus that causes MERS has been found in camels throughout the Middle East. Daniel Lucey, an infectious diseases specialist at Georgetown University Medical Center, said that the similarities between SARS-CoV-2 and coronavirus families like SARS and MERS are a compelling argument that the strain type This virus can be transmitted in the same way. However, if this hypothesis is correct, it remains unclear what the intermediate host for the transmission of the virus from animals to humans is. The WHO team analyzed samples from thousands of domestic animals across China, all of which tested negative for SARS-CoV-2. Mr. Lucey said that the WHO team did not adequately examine mink raised in China, one of the suspected intermediate hosts. 3. Transmission through frozen food WHO assesses the possibility that SARS-CoV-2 transmission through frozen food is probable. Another theory is that the virus can be transmitted to humans through the cold supply chain, the supply chain that distributes frozen food. In this case, the virus may have originated outside of China but spread into the country through the surface of the food packaging or in the food itself. This hypothesis gained interest in the summer of 2020 after several outbreaks in China. Since then, there has been some evidence that pathogens can survive longer at cold temperatures. However, while cold supply chains may play a role in new outbreaks, scientists say there is little reason to think that is the source of the pandemic. There is no direct evidence that SARS-CoV-2 causes food-borne outbreaks, while Rasmussen noted that SARS-CoV-2 is rarely spread through surfaces. . “It is not an impossibility. This possibility cannot be ruled out. But I think the current evidence is not enough to show that,” Ms. Rasmussen said. 4. Leaks from the lab According to WHO, the possibility of the SARS-CoV-2 virus leaking from the laboratory is extremely unlikely. The most controversial theory about the origin of SARS-CoV-2 is that the virus leaked from a laboratory in Wuhan, where scientists studied coronaviruses in bats. WHO scientists point out that there is little evidence that the virus leaked from the laboratory. An employee works at the laboratory of the Wuhan Institute of Virology (China). Photo: AFP There are 2 possibilities of the SARS-CoV-2 lab leak hypothesis, that is, a researcher was accidentally infected in the laboratory or the researchers intentionally invented a corona virus strain to create SARS. -CoV-2. However, the researchers completely rejected the second possibility that SARS-CoV-2 was created by genetic evidence that the virus arose spontaneously. WHO focuses on the possibility that the virus accidentally escaped from a laboratory where wildlife samples are being studied. Although there have been laboratory leaks in the past, the WHO report indicates that these are very rare. According to the WHO report, there is no record of any laboratory in Wuhan working on a virus closely related to SARS-CoV-2 before the first cases of Covid-19 were diagnosed. diagnosed in December 2019, nor have any laboratory staff reported symptoms of Covid-19. An article by the Wall Street Journal on May 23 stated that three researchers from China’s Wuhan Institute of Virology became ill in November 2019 and were hospitalized with “symptoms consistent with both Covid-19. -19 and seasonal flu. However, Chinese Foreign Ministry spokesman Zhao Lijian on May 25 denied this information. When the WHO report was released in April, Mr. Lucey believed the hypothesis was plausible, although less likely than animal-to-human transmission due to the lack of evidence. Lucey pointed out that there was no forensic investigation of the Wuhan labs. “There really isn’t any way to prove or disprove the lab leak theory based on what is presented in this report,” Ms. Rasmussen said, noting that, to address the issue, A forensic examination of the laboratory is required to find the origin of SARS-COV-2. According to expert Robertson, supporters of the virus lab leak hypothesis argue that SARS-CoV-2 has spread too quickly and effectively in humans to become a virus of natural origin. But if SARS-CoV-2 is a “smart” virus, according to genomic studies, Robertson said, it is not surprising that it infects humans so quickly and so strongly.

The quarantine area of ​​the National Defense and Security Training Center – which is concentrating on quarantine for citizens from Taiwan All of these citizens were allowed to take samples for Covid-19 as prescribed. By the afternoon of 10.5, the test results showed that 236/236 citizens were negative for the first time for SARS-CoV-2. Citizens will be kept on quarantine for a full 21 days and have at least 2 times tested negative for SARS-CoV-2 under the new regulation to be eligible to complete quarantine. Currently, the whole province is organizing isolating 417 people, isolated at home with 2,207 people. Of which, all 45 F1 cases related to Covid-19 cases inside and outside the province tested negative for SARS-CoV-2. The Health sector is coordinating with relevant agencies to urgently trace F1 and F2 subjects related to patients announced by the Ministry of Health. As of October 10, the province has vaccinated for 7,981 priority subjects, achieved nearly 93% of the target, ensuring vaccination safety.