What is close contact?

How to judge dense connection and sub-dense connection

Now in the critical stage of defending the epidemic in Shanghai, close contacts involving close contacts in our city were investigated and controlled at the first time. So what are close contact and sub-close contact? What if it is judged as secret connection or sub-secret connection? Many friends have heard a lot about epidemic prevention and control. Let's learn about it with Bian Xiao.

According to novel coronavirus Prevention and Control Plan (Eighth Edition), Shanghai novel coronavirus Prevention and Control Plan (202 1 Edition), and Suggestions on Judgment and Isolation Management of Close and Sub-Close Contacts of COVID-19 Infected Persons; According to the actual situation of epidemic situation and prevention and control in Shanghai, the following judgments are made.

First, what is close contact?

People who are in close contact with suspected cases and confirmed cases but have not taken effective protection since 4 days before symptoms appear, or 4 days before sampling asymptomatic infected people. According to the results of epidemiological investigation, combined with big data information such as activity tracks provided by relevant departments, epidemiological investigation professionals determine the secret connection according to the following principles:

1) Positive infected people are strict static managers. If they live in separate kitchens and bathrooms, then they are closely related to the people who live together. If the house does not have independent kitchen and bathroom conditions, the contact person is the person who lives together, the person who uses the kitchen and bathroom, and the person who contacts on the same floor or the same house.

2) Positive infected persons are the key personnel involved in the operation and prevention of social security, and they are residents in the prevention area. According to the novel coronavirus Prevention and Control Plan (Eighth Edition), close contacts should be strictly judged, with emphasis on those who work together, live together, ride together, eat together and use the toilet together.

3) The positive infected persons are personnel from key places and units (nursing homes, mental hospitals, supervision places, construction sites, enterprises, etc.). ) implement closed management. Close contacts are people who work together, live together, eat together and go to the toilet together, as well as medical/supervisory personnel who have not taken effective protective measures, visiting family members or other close contacts.

4) On-the-spot investigators shall evaluate other personnel who meet the standards of close connection according to the on-site conditions and environmental test results.

2. What is a sub-dense connection?

For people who have frequent contact with people with high risk of infection in life, work and study, it can be judged as a second secret contact. The judging principle is:

1) Positive infected people are strict static managers. If you live in all independent kitchen and bathroom conditions, the second place is the residents on the floor and the upper and lower floors where the positive infected people live. If the residence does not have independent kitchen and bathroom conditions, the second person is the resident of the building/village house where the positive infected person is located.

2) Positive infected persons are the key personnel involved in the operation and prevention of social security, and they are residents in the prevention area. According to the Prevention and Control Plan of novel coronavirus (Eighth Edition), the sub-secret connection is strictly determined.

3) The positive infected persons are personnel from key places and units (nursing homes, mental hospitals, supervision places, construction sites, enterprises, etc.). ) implement closed management. Sub-close contacts refer to people who have close contact with positive infected people for the first time until close contacts are isolated and managed, but have not taken effective protection.

4) According to the field conditions and environmental test results, the field investigators evaluate other people who meet the criteria of close contact.

3. How to manage secret personnel

The first is to carry out "5 days of centralized isolation +5 days of home isolation". During the period of centralized isolation, the 1 nucleic acid test shall be conducted on the first 1 day, and the 1 antigen test shall be conducted on the second and fourth days, and the 1 nucleic acid test shall be conditionally encouraged every day. During home isolation, 1 nucleic acid detection was carried out on the 3rd and 5th day respectively, and 1 antigen detection was carried out on the 2nd and 4th day in the morning and afternoon respectively. Second, during the period of home isolation, we should strictly implement "one person, one household or one household" and take measures such as door-to-door magnetic attraction or sealing to achieve "home service". If there are people living together, they should be isolated at home together with regular nucleic acid and antigen testing. Three, do not have the conditions of home isolation, continue to implement centralized isolation for five days. Fourth, strengthen the quarantine period to give health code "red code", and give health code "yellow code" during the home quarantine period. The fifth is to dynamically adjust the management mode and duration according to the epidemic situation and the actual prevention and control.

4. How to manage sub-secret personnel

First, the "7-day home isolation +7-day health monitoring" was implemented. On 1, 4, 7 and 14 days, the nucleic acid was detected 1 times, and the antigen was screened on the second and third days. Second, the health code is given a "yellow code" during home isolation and a "green code" during health monitoring. The third is to dynamically adjust the management mode and duration according to the epidemic situation and the actual prevention and control.

Bian Xiao once again reminded everyone that in the critical period of the epidemic, don't relax, consciously abide by the epidemic prevention policy, do personal protection, report problems in time, and build a strong epidemic defense line. Let's meet the victory together!