Delineate the smallest "medium-risk area", where is the confidence of Shanghai under the epidemic?

Since the outbreak of the new crown epidemic, Shanghai has never conducted nucleic acid testing for all employees.

Written by | Ling Jun

Source | "Medical Community" public account

Shanghai's precision prevention and control has reached a new height.

On January 13, Shanghai added five new cases of local infection with the new crown virus, and Shanghai listed No. 228 Yuyuan Road, Jing'an Temple Street, Jing'an District, as a medium-risk area. This should be the smallest medium-risk area in the world since the outbreak of the new crown epidemic, only more than 20 square meters, is a milk tea shop.

On 11 January, a case of asymptomatic infection imported from abroad was reported in Shanghai. After rapid investigation and investigation, 3 milk tea shop staff and 2 related close contacts were diagnosed one after another.

According to the "Tianmu News" news, the barber shop clerk located next door to the milk tea shop said today that the barber shop is open normally, the clerk is working normally, and the health code has not changed.

Image source: Shanhai video

Why is it so divided. The Shanghai Municipal Health Commission said at a press conference held last night that the 5 infected people belong to the same transmission chain as the previous one case of asymptomatic infection imported from abroad, and they were all found in the routine nucleic acid screening test during the isolation and control period. At the same time, all the close contacts are negative, counting 2830 people, and all of them have been isolated and controlled.

This information shows that the risks of the five local covid-19 infected people in Shanghai are generally controllable.

In fact, since the outbreak of the new crown epidemic, Shanghai has never conducted nucleic acid testing for all employees.

How is Shanghai's precise prevention and control done? Over the past year, the topic has been frequently discussed online.

"Golden 24 Hours", on September 29, 2021, at the press conference of the Joint Prevention and Control Mechanism of the State Council, Wu Jinglei, director of the Shanghai Municipal Health Commission, introduced:

After the outbreak of the epidemic, the first 24 hours is very important, this process "does not stay overnight", once the suspicious case is found, the circulation work, the disposal of control personnel and community risk control control, nucleic acid screening, information disclosure are quickly synchronized.

As early as 2020, Shanghai summed up the principle of "four mornings and five most", one of the most important points is that "the comprehensive benefits are the best", and the impact on economic and social life is minimized on the basis of protecting public health.

Balanced Governance: How Successful is Normalization of Epidemic Prevention and Control? From November 2020 to December 2021, a total of 9 outbreaks occurred in Shanghai. In the 9 epidemics, Shanghai isolated and managed a total of 1,400 close contacts, 5,039 close contacts, and 430403 nucleic acid screening:

Based on the permanent population of 25 million in 2020, the cumulative nucleic acid screening personnel in the nine epidemics accounted for about 1.7% of the total population of Shanghai;

In addition to the closed management of 13 residential areas, 1 hotel and 2 hospitals for 14 days, and the closed-loop management of 2 hospitals for 2 days, nucleic acid testing and overall regional closure management have never been implemented in any administrative district;

No restrictive measures have been taken throughout the city that may affect the production and operation of enterprises and the working and life of citizens.

The response was rapid, Director Wu Jinglei publicly said that the emergency teams at the Shanghai and district levels were on duty 24 hours a day, and once the epidemic situation report was received, the circulation team arrived at the scene within 2 hours, completed the core information within 4 hours, preliminarily checked the basic situation within 24 hours, and completed the circulation report.

Some time ago, the staff of a cd-operative center in Shanghai told the "medical community" that their circulation and mapping work was basically completed overnight, "do not disturb the residents in the non-risk range, they sleep up normal daytime work and life, feel that nothing has happened, but in fact, the relevant epidemic prevention work has ended." ”

This is also an important reason why after each outbreak, Shanghai residents have hardly felt that their lives have been affected.

In October 2021, Shanghai Disneyland, because a person diagnosed with the new crown had entered the park the day before, emergency nucleic acid screening for tourists and staff in the park on the evening of the 31st ended in 5 hours, all negative. The requirements for the subsequent Shanghai release are:

During the 30th and 31st, the admission personnel will carry out 2-day closed-loop management and 12-day community health management.

Only need to stay home for 2 days. It should be known that many other cities at that time had regulations for returnees from Shanghai Disneyland, at least 7 days of quarantine.

At the same time, just 2 days later, on November 3, Shanghai Disneyland announced the resumption of business. This decision caused a lot of doubts online at the time. However, it turned out that there was no subsequent transmission of the epidemic.

In fact, the seemingly loose epidemic prevention policy is based on the scientific judgment of decision-makers and expert teams in "precision prevention and control".

"Science and Democracy" Shanghai hospital sense management experts once told the "medical community" that throughout the epidemic prevention process, the Shanghai government provided experts with a lot of opportunities to make suggestions and suggestions, taking into account administrative requirements and professional considerations at the same time, good at combining the views of all parties to make scientific decisions.

On November 8, 2020, an outbreak occurred in Pudong, Shanghai. Balanced Governance: How Successful is Normalization of Epidemic Prevention and Control? The article reviewed several epidemic prevention measures at that time:

In the case that the source of the pollution has left the country and the close connection has been controlled, the risk of subsequent spread of the epidemic is small, and there is no need to expand the scope of nucleic acid detection;

When the 14-day closed-loop management of a closed residential community was about to end, a new case was added to the close contacts who had been isolated and managed, but the isolation time of other residents was not extended.

According to the article, Wu Fan, a member of the Shanghai Municipal Public Health Expert Group on Epidemic Prevention and Control, explained:

"The new case is a close contact person who has been isolated, belongs to the 'circle of personnel', has been included in the management in advance, according to the epidemiological investigation situation, the number of continued infections is zero." Based on the research and judgment of experts, the prevention and control headquarters ended the closed-loop management of residential areas on time and adjusted from medium-risk areas to low-risk areas. ”

The same is true of this outbreak. Before delineating the risk area, shopping malls, schools, residential quarters and other related places have undergone the first time of flow mapping.

Resources:

1. Balanced Governance: How Can Normalization of Epidemic Prevention and Control Succeed? ——A sample of epidemic management in a Chinese megacity", Sohu City, https://www.sohu.com/a/514970782_120179484

Source: Medical community

Editor-in-charge: Zheng Huaju

Proofreader: Zang Hengjia

Plate making: Xue Jiao