(Fighting New Coronary Pneumonia) The spreading chain of the epidemic in Nanjing continues to extend: how to prevent and control the summer epidemic?
China News Agency, Beijing, August 3 (Mar Shuaisha Li Chun) China's new round of local new crown pneumonia epidemic has now spread to more than ten provinces, autonomous regions and municipalities including Liaoning, Anhui, Hunan, Beijing, and Sichuan, and the number of confirmed cases continues to increase.
The current epidemic situation in mainland China includes further spread due to import from Nanjing Lukou Airport, as well as internal infections in Zhengzhou hospitals due to poor protection. Why the epidemic spreads in many places in the summer, where are the loopholes in the epidemic prevention, and the protection of vaccines have attracted continuous attention.
Data map: Citizens accept samples for nucleic acid testing.
Photo by China News Agency reporter Yang Bo
According to official reports, the source of the Nanjing epidemic was the CA910 flight that entered Russia on July 10. After cleaning staff from Nanjing Lukou Airport participated in the cabin cleaning work of this flight, some cleaning personnel may be infected due to irregular protection and elution. Then spread among the cleaning staff.
The recent rebound of the epidemic due to human reasons is also in Zhengzhou. Most of the infected people occurred inside a hospital in the city, exposing the loopholes in the hospital's sense of hospitality.
After genetic sequencing, the first two infected people had a high degree of homology with the virus strains of the confirmed patients who entered Myanmar and were treated in the hospital, and they were both delta mutant strains, which also showed that there are still weak links in the foreign defense import work.
Faced with the pressure of overseas imports, He Qinghua, the first-level inspector of the CDC of the National Health Commission of China, pointed out that those high-risk posts at these ports who have direct contact with entry personnel, incoming goods and the environment should implement closed-loop management and try to avoid contact with other groups of people. get in touch with.
Workplace personnel for international and domestic flights should have fixed positions, and airport staff should be managed by divisions to avoid cross-operations and to avoid bringing the risk of overseas epidemics to domestic flights.
Data map: Citizens lined up in an orderly manner, ready to receive samples for nucleic acid testing.
Photo by China News Agency reporter Yang Bo
On the other hand, after the outbreak in Nanjing, many related cases were subsequently found in other provinces and cities, and the chain of transmission of the epidemic continued to extend.
Gene sequencing in Beijing, Chongqing, Sichuan and other places found that the infected strain of the confirmed case was a Delta mutant strain, which was highly homologous to the Nanjing epidemic virus; Zhangjiajie, Hunan has become a recent key epidemic site with a large number of infections and transmissions outside of Nanjing.
From international airports to tourist attractions and entertainment venues, from overseas imports to domestic spread, the spread of the epidemic mostly occurred in places with dense populations and large flows of people.
It is currently in the peak summer travel season, and the risk of spread of the epidemic and the difficulty of prevention and control have further increased.
Previously, epidemics often occurred in cold-chain goods transportation or cold weather, but this round of epidemics spread in many places in summer.
In the face of the Delta mutant strain that spreads fast, replicates quickly in the body, and turns negative for a long time, whether the virus still has a strong transmission ability at room temperature has further aroused public concern.
In this regard, Feng Zijian, a researcher at the Chinese Center for Disease Control and Prevention, suggested that the coronavirus can survive for a certain period of time and cause infection even in a relatively high temperature environment.
Therefore, in the normal temperature and high temperature seasons, while cleaning and disinfecting high-pollution risk items, personal protection is still required.
While doing physical protection, vaccination is also an important measure for epidemic prevention and control.
In this epidemic, there are still people infected after being vaccinated, and the protective effect of the vaccine has once again raised concerns.
"If you don't get the vaccine, the number of people infected may be more." Zhang Wenhong, director of the Department of Infectious Diseases of Huashan Hospital, Fudan University, said on social media that relevant data after Chile's mass vaccination of China's inactivated vaccine showed that China was inactivated. The vaccine is highly effective in preventing the severity of the new crown, hospitalization and death.
"From the current global situation, being infected after a vaccine is called a breakthrough case. It is a normal situation and is not an exception." Shao Yiming, a member of the expert group of vaccine research and development team of the scientific research group, pointed out that clinical data shows that any vaccine It is not 100% prevention of infection, but the general judgment is that various variants are still within the controllable range of existing vaccines.
Wang Guangfa, director of the Department of Respiratory and Critical Care Medicine of Peking University First Hospital, also said in an interview with a reporter from China News Agency that the role of vaccines is not only to prevent infection, but also to prevent disease, prevent severe illness, reduce the amount of toxins discharged, and reduce infection to others. Human risk.
The protection of the new crown vaccine against the delta strain may decrease, but judging from recent cases, the vaccine is still effective.
"We still have an advantage now, that is, through the production of existing new crown vaccines, we have made reserves of technology and production capacity. Even if new strains appear and mutations occur in key locations, they can be faster than the previous development and production of vaccines. Many." Wang Guangfa said.
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