Definition: it mainly refers to the discovery point, residence point, work point, activity point and surrounding areas of medium and high risk areas and positive cases.

Control measures: close the closed area, give yellow code to residents, strictly implement home isolation measures, arrange 24-hour patrol duty, prevent people from going out and moving, and ensure that cars can't get out indoors and in the area, and the necessary living materials can be delivered to the door.

If you really need to go out for medical treatment, you must issue a certificate by the community, review and register, arrange a special car, provide personal protection throughout the whole process, and implement closed-loop management. All personnel in the blockade area can only enter and leave, and gathering is strictly prohibited. During the closed period of 1, 4 and 7 days, all personnel were tested for nucleic acid.

2. Control area.

Definition: it mainly refers to the residence, work place, activity place and surrounding areas of close contacts, sub-close contacts and people with high exposure risk of positive cases.

Control measures: control measures such as people are strictly prohibited from leaving the area and gathering in the control area. In principle, the control area stays at home (except for participating in the unified nucleic acid screening), and each household can arrange 1 person to go to the designated place in the community to buy living materials in different regions and in different periods under the premise of strict personal protection. For those who really need to go out for medical treatment, the community will issue a certificate and do a good job in auditing and registration.

All entry-exit personnel must carry out verification, code inspection, temperature measurement, registration and 48-hour nucleic acid test report. Wear a mask at home, try to reduce the contact between family members, and take measures such as environmental disinfection and indoor ventilation. All other closed public places are closed except shopping malls, supermarkets and farmers' markets to ensure the normal living needs of residents.

3. Prevention area.

Definition: refers to the activity area of key people who may be exposed outside the closed area and control area. With the division of the three regions, differentiated circle management is formed.

Control measures: social control is implemented in the prevention area, and the scale of personnel gathering is strictly limited. Strictly limit the gathering of people, strictly implement measures such as entering indoor public places to make an appointment for peak shift, measuring temperature, scanning code, wearing masks, etc., delimit shopping areas, limit shopping time, and go out at peak shift. Shopping malls, supermarkets and farmers' markets in the prevention area restrict passenger flow, restaurants are forbidden to eat in the hall, and other entertainment closed places are closed.

Travel policy:

Personnel in the announced closed control, control and prevention areas shall not leave the local area without the approval of the epidemic prevention and control department of the city or district (county). Residents in other parts of the city do not have to leave the local area or the province.