News 1+1丨This round of domestic epidemic has been effectively controlled. What should we do to prevent and control the delta mutant?

　　As the country’s existing local confirmed cases have declined for 11 consecutive days, this indicates that the current round of domestic epidemics that began at Nanjing Lukou Airport in Jiangsu have been effectively contained.

Looking back on this round of the epidemic, what enlightenment does it bring to the normalized prevention and control of the future?

my country's new crown vaccination has exceeded 2 billion doses. What role can it play in the normalized prevention and control of the future?

　　From August 2 to August 26, a total of 10 local confirmed cases were found in Shanghai, which were divided into three waves of sporadic epidemics that were not homologous.

Although it is not related to cases in other parts of the country, it is also a delta variant, and most of it is also related to the airport.

　　In 25 days, 3 waves of epidemics, no work stoppages, no large-scale lockdowns, and no large-scale nucleic acid testing, Shanghai quickly contained the epidemic.

After the confirmed cases were found, the Shanghai CDC carried out epidemiological investigations, trajectory tracking, and investigations of related contacts around the cases overnight, and delineated three prevention and control circles for related contacts according to the level of risk.

　　As an important port city in China, Shanghai has been facing tremendous pressure from foreign defense imports.

The Shanghai Municipal Disease Control and Prevention Agency minimized the scope of the epidemic through precise and rapid investigation and prevention and control. At the same time, Shanghai conducted 7 nucleic acid tests on close contacts under isolation and closed-loop management.

The spreading chain of foreign cargo aircraft operators at Shanghai Pudong Airport is currently fully controllable

Wu Fan, member of the expert group of the Shanghai Leading Group for Epidemic Prevention and Control and Deputy Dean of Shanghai Medical College of Fudan University: The

current epidemic is completely controllable.

The first case was discovered during regular screening of high-risk workers, and it was discovered very early.

We have done a very comprehensive flow reconciliation and mapping, and implemented classified management and control of all close and sub-close connections and high-risk groups.

The incubation period of close contact cases varies from person to person, and will appear within 1 to 14 days.

The incubation period of the delta mutant is slightly shorter. The average incubation period is 3 to 5 days, but there are also 7 days.

So recently a patient with a 7-day incubation period developed symptoms.

This patient has been in isolation during the detoxification period 2 to 4 days before the onset of illness, and he had not started detoxification when his close contact was in contact with him. Therefore, we judged that although there was a close contact in the epidemic and showed subsequent positives, the entire transmission chain It has been completely blocked.

The increased number of confirmed cases in Shanghai’s Songjiang District Central Hospital is also fully controllable

Wu Fan, member of the expert team of the Shanghai Leading Group for Epidemic Prevention and Control, and deputy dean of Shanghai Medical College of Fudan University:

There was a previous case confirmed by a nurse at the Songjiang District Central Hospital. Since these are high-risk operating groups, individuals may be infected with a little negligence.

What followed were close contacts of the confirmed case, not medical staff.

Closely connected and sub-closed populations are already under quarantine control, which means that as long as the relevant positives are found in the follow-up, they are all in this circle and still on this transmission chain, and there is no off-chain. We believe that this epidemic is controllable.

In 25 days, there were only 10 confirmed cases from 3 sources. How can Shanghai quickly block the spread of the Delta mutant strain?

Wu Fan, member of the expert group of the Shanghai Leading Group for Epidemic Prevention and Control, and Deputy Dean of Shanghai Medical College of Fudan University

:

　　The most critical point is "early": both the nurses at Songjiang Central Hospital and the two porters at Pudong Airport were all discovered as high-risk groups during routine periodic testing. One of them was almost just infected within a day. , Was discovered the next day.

The advantage of early is that the people you contact and the scope involved are very limited;

　　"Fast": Once a positive case is found, it is very fast to trace the close connection and sub-close connection and draw circles for high-risk groups.

Shanghai now basically counts hours by the hour, carrying forward the spirit of staying the night, and arranging quickly.

　　"Accurate": Need a high-quality, high-level epidemiological investigation team, not only dedicated, but also professional.

　　"All": Follow the rules on the basis of evidence-based science, and rank all the relevant personnel in.

We are not pursuing precision and precision, but more importantly, we can sort it out earlier and faster based on scientific concepts.

Strive to control the epidemic to a minimum, minimize social costs, and minimize social impact.

In the face of the Delta mutant, what should be the next step in prevention and control?

Zheng Zhongwei, leader of the vaccine research and development working group of the joint prevention and joint control mechanism scientific research team:

for

workers

with high import risks, such as customs, border inspections, aviation, isolation points, designated medical institutions, etc., intensive vaccination can be carried out 6 months after completing the immunization procedure .

In addition, during routine vaccination, we also found that people with relatively low immune function, and people over 60 years old, have less immune effects after vaccination than those aged 18 to 59 years old.

But this group of people is precisely the high-risk group after infection.

Therefore, experts also suggest that a booster shot can be given to these groups of people 6 months after vaccination.

Due to the needs of work, study and communication, there are still some people who want to go to overseas high-risk areas or countries.

Experts also suggest that booster immunizations can be carried out for such groups of people 6 months after vaccination.

What are the shortcomings of prevention and control exposed in the current round of the national epidemic?

Wu Fan, member of the expert group of the Shanghai Leading Group for Epidemic Prevention and Control, and deputy dean of the Shanghai Medical College of Fudan University:

①The first national line of defense "lost". In the state where the epidemic is completely cleared, the source of the virus must be imported from abroad. Therefore, airports, ports and other ports are the first line of defense.

The second line of defense is personal protection.

The third line of defense is outpatient clinics and fever clinic sentinels of medical institutions. If you come in, can you find this person out in the first place?

The role of ports and medical institutions, I believe, may not be fully utilized in a period of time.

② Paralysis under normalized prevention and control: The normalized prevention and control measures are not difficult in themselves. The difficulty is that it is 365 days a year, 24 hours a day, and everyone involved must be well regulated. This is difficult.

③The construction of the public health system is not perfect: the bottom of the bottom of the social grassroots governance system is not sufficiently consolidated.

In the face of the current domestic epidemic caused by the delta mutant strain, is the vaccine still effective?

Wu Fan, member of the expert group of the Shanghai Leading Group for Epidemic Prevention and Control and Deputy Dean of Shanghai Medical College of Fudan University:

Vaccines are useful.

① The proportion of severely ill people who have been vaccinated is decreasing.

②Researches at home and abroad have found that although people who have been vaccinated can be infected with the virus, their viral load declines at a rapid rate. This means that the duration of infection for people who have been vaccinated is shorter and that the transmission capacity is reduced.

But this also brings us certain challenges. For example, a patient has no symptoms after infection, or the symptoms are very, very mild, and he is not aware of it, which brings certain challenges to early detection.

But even if there are some challenges, we still believe that high-level, high-proportion vaccination for the entire population will provide a good protection for the entire population.

In terms of long-term strategy, it must be a high proportion of universal vaccination and non-drug interventions.

Can the Mid-Autumn Festival and National Day travel normally?

Can!

But we must do a good job of prevention strategy

Wu Fan, member of the expert group of the Shanghai Leading Group for Epidemic Prevention and Control, and Deputy Dean of Shanghai Medical College of Fudan University: It is

perfectly possible to travel, but you must make a good strategy during your travels. It is not a strategy for where to go, but a strategy for personal protection against the epidemic.

This strategy includes the "three-piece" and "five stills": wear a mask, maintain social distancing, and maintain personal hygiene.

Masks must be worn, social distance must be kept, coughs and sneezes must be covered, hands must be washed frequently, and doors and windows must be opened as much as possible. These are important measures to help us take personal protection.