What are the criteria for determining close contacts?

The judging criteria are as follows:1. Family members living together in the same room;

2. Direct caregivers or those who provide diagnosis and treatment and nursing services;

3. Medical workers who carry out diagnosis and treatment activities that may generate aerosols in the same space;

4. All personnel in close contact with the office, workshop, team, elevator, canteen, classroom, etc.;

5. Personnel who eat together, entertain together and provide catering and entertainment services in a closed environment;

6. Medical staff, family members or other persons who have close contact with the case;

7. Passengers who take the same means of transportation and have close contact (within 1 meter), including caring for nursing staff and companions (family members, colleagues, friends, etc.) on the vehicle. Different means of transportation have different methods for determining close contact;

8. Persons exposed to environmental contamination that may be contaminated by cases or asymptomatic infected persons;

9. After investigation, the on-site investigators are assessed to be other persons who meet the criteria for determining close contacts.

Close contacts refer to suspected cases.

and confirmed cases started 4 days before the onset of symptoms, or asymptomatic infections.

Persons who have been in close contact within 1 meter of the specimen from 4 days before the specimen sampling and do not take effective protection will be identified as close contacts. The specific exposure is as follows:

One is people who live, study, work, or have close contact, such as working in close proximity or sharing the same classroom or living in the same house.

The second is medical staff, family members or other persons who have similar close contact with the case in the diagnosis and treatment, nursing and visiting of the case, such as visiting the patient or staying in a closed environment, other patients in the same ward and their accompanying personnel.

The third is to take the same means of transportation.

and close contacts, including caregivers on the transport, companions (family, colleagues, friends, etc.), or other passengers and crew members who are found to be in close contact with cases and asymptomatic infections after investigation and assessment.

Fourth, on-site flow survey.

Persons who are assessed after investigation and believe that they meet the criteria for the determination of close contacts.

Academician Zhong Nanshan issued a new concept of close contact based on the Delta variant: in the same space, the same unit, and the same building, they are close contacts when they get along with the patient four days before the onset of the disease.

There are 3 categories of close contacts.

Population classification criteria: close contact, sub-close contact, general contact.

Close contacts are those who have had close contact with suspected and confirmed cases from 4 days before the onset of symptoms, or from 4 days before the sampling of specimens from asymptomatic infected persons, but have not taken effective protection.

Close contact (sub-close) refers to the first contact between a close contact and a case or asymptomatic infected person (the first contact between a close contact and a case or asymptomatic infected person during the period between 4 days before the onset of the case or 4 days before the sampling of the asymptomatic infected person's specimen and before being quarantined and managed) to the time the close contact is isolated and managed, and the close contact has close contact with the close contact, such as living together, working in the same closed environment, having dinner and entertainment, but no effective protection has been taken.

General contacts refer to persons who have been in contact with suspected cases, confirmed cases, and asymptomatic infected persons in the same means of transportation such as planes, trains, and ships, and in the process of living, studying, working, and receiving medical treatment, as well as those who have been exposed to public places such as shopping malls, farmers' (bazaar) markets, bus stops, and subways, but do not meet the principle of determining close contacts.

Identification of close contacts.

1. Family members living together in the same room;

2. Direct caregivers or those who provide diagnosis and treatment and nursing services;

3. Medical staff who carry out diagnostic and therapeutic activities that may generate aerosols in the same space.

4. All personnel in close contact with the office, workshop, team, elevator, canteen, classroom, etc.

5. Personnel who eat together, entertain together and provide catering and entertainment services in a closed environment;

6. Medical staff, family members or other persons who have close contact with the case;

7. Passengers who take the same means of transportation and have close contact (within 1 meter), including nursing staff and companions (family members, colleagues, friends, etc.) on the means of transportation.

8. Persons exposed to the environment and items contaminated by cases or asymptomatic infected persons.

9. Other persons who are assessed by on-site investigators to meet the criteria for determining close contacts.

Summary. Hello! Here are the latest four criteria for judging reflected by the netizens we have collected:

The main criteria for determining close contact are as follows: Criterion 1: whether there are people who live, study, work together, or have close contact in other ways, because there will inevitably be close contact and virus infection in this process.

Criterion 2: Whether they have taken the same car, bullet train, high-speed rail, and have had close contact with people, including passengers, train crews, etc., all belong to the category of close contacts. Criterion 3:

People who have visited, diagnosed, treated, and cared for confirmed patients, whether they are their own family members, friends, or professional medical staff, are also close contacts and need to be quarantined for observation. Criterion 4: Other close contacts confirmed by other investigations.

Hello! The latest standards are subject to change with the changes in the national epidemic prevention policy. At the same time, in the process of implementation in various regions, under the influence of various forms of Qin Liang Qing, there are also different slag seepage. Thank you for your question!

Fellow, I really didn't understand, I can be more specific.

Hello! Here are the latest four criteria for judging reflected by the netizens we collected: The main criteria for judging close contact are as follows:

Criterion 1: Whether there are people who live, study, work or otherwise have close contact with each other, because there will inevitably be close contact and infection of the virus in this process. Criterion 2:

Whether you have taken the same car, bullet train, high-speed rail, and have had close contact with people rushing to the shed, including high-purity passengers, train crew members, etc., all belong to the category of close contacts. Criterion 3: People who have visited, diagnosed, treated, and cared for confirmed patients, whether they are their own family members, friends, or professional medical staff, are also close contacts and need to be quarantined for observation.

If you still have specific questions, you can also tell me again

There are 3 categories of close contacts. Population classification criteria: close contact, sub-close contact, general contact.

For close contacts, the sedan chair is a person who has had close contact with suspected cases and confirmed cases starting 4 days before the onset of symptoms, or 4 days before the sampling of asymptomatic infected person specimens, but has not taken effective protection. Close contact (sub-close) refers to the first contact between a close contact and a case or asymptomatic infected person (the first contact between a close contact and a case or asymptomatic infected person during the period between 4 days before the onset of the case or 4 days before the sampling of the asymptomatic infected person's specimen and before being isolated and managed) to the time before the close contact is isolated and managed, and the close contact has close contact with the close contact, such as living together, working in the same closed environment, having dinner and entertainment, but no effective protection has been taken. General contacts refer to persons who have been in contact with suspected old and wild cases, confirmed cases, and asymptomatic infected persons in the same means of transportation such as planes, trains, and ships, and in the process of living, studying, working, and receiving medical treatment, as well as those who have been jointly exposed to public places such as shopping malls, farmers' (bazaar) markets, bus stations, and subways, but do not meet the principles for determining close contacts.

A close contact is a close contact with a virus (Delta strain, 2019 novel coronavirus, SARS, swine flu......Persons who have had close contact with suspected and confirmed cases starting 2 days before the onset of symptoms, or 2 days before the sampling of specimens from asymptomatic infected people, but have not taken effective protection.

This includes co-residents, healthcare workers in medical and therapeutic activities that may produce aerogel, people who dine or play together in confined environments, people who have close contact with each other in the same venue, people who visit cases, and other forms of direct contact, such as accompanying people of cases, caregivers or companions who travel in the same vehicle and have close contact (within 1 meter).

Investigation and tracking.

1) Local health departments shall, under the leadership of the local authorities, work closely with relevant departments to take all necessary measures to trace all close contacts of the patient; For close contacts involving cross-regional contacts, the relevant provinces may be notified to assist in tracing.

2) The local disease prevention and control agency is responsible for the registration and investigation of close contacts.

3) The local health administrative department shall immediately report to the local foreign affairs department and notify the Ministry of Health of the relevant situation involving close contacts of foreign nationals.