A week ago, Nanjing, the eastern coastal city of China, detected 9 positive results in a regular nucleic acid test at Lukou Airport. In the next week, the trajectory of related cases was extended to 5 provinces in China, and the cumulative number of infections reached hundreds. Chinese officials confirmed the cause This epidemic is the variant virus Delta (Delta). Most people diagnosed at the airport have been vaccinated, and the outside world is concerned about the protection of China’s vaccine against the mutant virus.
At the seventh news conference on the prevention and control of the new crown epidemic in Nanjing, Jiangsu Province on the morning of July 27, Ding Jie, deputy director of the Nanjing Centers for Disease Control and Prevention, reported that from the case of completed gene sequencing, the current strain causing the Nanjing epidemic was The delta strain is the most prevalent strain in the current global epidemic.
Ding Jie said that from the previous related epidemics, the new characteristics of this strain are increased adaptability to the body, faster transmission, higher virus load, longer treatment time, and easier development of severe illness.
How did the current round of epidemic in Nanjing break out?
The outbreak in Nanjing started on the morning of July 20 a week ago. During regular nucleic acid tests on the staff of Nanjing Lukou International Airport, 9 positive results were found. The cases were first found in the cabin cleaners and passed through relevant persons. Social activities, family contact, and pollution of the workplace caused the virus to spread further. The patients initially were mainly security personnel participating in airport flights.
Jin Dongyan, a professor at the School of Biomedical Sciences at the University of Hong Kong, said that the Nanjing Lukou Airport epidemic may be a small “super spreading incident.” First, individual cleaning staff were infected by contact with inbound infected persons or inbound pollutants, and then spread to other cleaning staff.
Professor Yu Chuanhua, an epidemiology and health statistics expert at Wuhan University, said in an interview with China’s “Health Times”: First, some people have the mentality to relax the prevention and control of the epidemic. It is believed that China (domestic) is already very safe and will not be infected again after being vaccinated. In addition, the weather is hot, and the basic prevention and control measures of wearing masks, maintaining social distancing, and washing hands frequently are lax. Second, international ports such as airports and cargo terminals are important sources of imported cases of COVID-19 and COVID-19. In addition to human-to-human transmission, many goods and even the air can also carry the virus and spread it to people. This time, the cabin cleaning infection of Nanjing Airport does not rule out the failure to wear a mask when cleaning the cabin.
As of 24:00 on July 26, Nanjing City had reported a total of 106 local confirmed cases and 6 local asymptomatic infections. Among them, 66 cases were light type, 38 cases were ordinary type, and 2 cases were heavy type.
Nanjing announced that it has entered a “wartime” state, and the Nanjing Centers for Disease Control and Prevention announced that all communities (communities) will be fully controlled for entry and exit. Express and takeaway personnel are not allowed to enter the community, and the owner will collect it by himself at a designated location. In addition, people who do not live in the middle and high risk areas of the community are not allowed to enter, and other people and vehicles not in the community are strictly controlled.
As of July 27, Nanjing has launched two rounds of nucleic acid testing for all employees. In key areas, even the third round of nucleic acid testing has been completed.
Starting in the second half of 2020, traffic control between cities in China has basically been liberalized, and the public can freely shuttle and travel between cities.
Within a week after the outbreak in Nanjing, the relevant cases spread to 9 cities in 5 provinces including Sichuan, Guangdong, Liaoning, and Anhui. The transmission chain has infected 126 people, and the main confirmed cases are currently concentrated in Jiangsu Province.
Most people diagnosed in Nanjing have been vaccinated
Most of the confirmed cases in Nanjing this time are related to Lukou Airport, which belongs to the Eastern Airport Group. According to news published on the airport’s official website, as of May 12, the total number of vaccinated people in Eastern Airport Group was 9,251, with an inoculation rate of 90.87%. Among them, Nanjing Airport organized a total of 29 vaccinations for its employees, and a total of 5,036 people were vaccinated. The vaccination rate reached 90.3%.
After the outbreak, Feng Jun, party secretary and chairman of the Eastern Airport Group Co., Ltd., has been suspended from his position.
On July 22, China’s “Global Network” quoted Yang Yi, director of the Department of Critical Care Medicine, Zhongda Hospital of Southeast University, saying that most of the infected people (airport) had been vaccinated against the new crown, and only one patient under the age of 18 did not. Vaccination. Those who have been vaccinated generally have mild symptoms and have a significantly lower chance of becoming severe. “Therefore, vaccination still has a protective effect. We call on everyone to do a good job of scientific protection at ordinary times, and insist on wearing masks scientifically after the vaccine.
Regarding whether the delta strain has been vaccinated with two injections and is still infected with the mutated virus, the protection of the vaccine has been reduced, the official has not said.