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Epidemic prevention and control cannot be completely ended in a short time, but it is likely to be in a state of epidemic prevention and control for a long time, which is determined by the complexity, long-term and arduousness of epidemic prevention and control in the capital. Therefore, in line with the normalization of epidemic prevention and control, we should continue to adhere to the overall prevention and control strategy of "external defense investment and internal defense rebound", scientifically and accurately analyze and judge the epidemic trend, and adhere to strict prevention and control.

Adhere to the principle of "putting prevention first, combining prevention with control, being scientific according to law, and classifying at different levels", adhere to the organic combination of normalized precise prevention and control and local emergency response, and resolutely guard against the import of overseas epidemic situations and the rebound of domestic epidemic situations in accordance with the work requirements of "timely detection, rapid response, precise control and effective treatment", and make every effort to do a good job in normalized epidemic prevention and control. Implement the measures of "early prevention, early detection, early reporting, early isolation and early treatment", adhere to the principle of "people-oriented", strengthen epidemic prevention and control in key time periods, key areas and key populations, find sporadic cases and cluster epidemics in time, and handle the epidemic early, small, strict, practical, scientific, accurate, powerful, orderly and effective, and put it out together and continuously.

(1) Report on epidemic discovery.

1. Case discovery report. All kinds of medical institutions at all levels should strengthen the monitoring of symptoms such as fever, dry cough, fatigue, sore throat, decreased sense of smell (taste) and diarrhea. Once suspicious patients such as fever are found, laboratory tests should be carried out in time, and the cases should be reported directly through China Disease Prevention and Control Information System within 2 hours. Community health service stations, village clinics and individual clinics should report fever and other suspicious patients to community health service centers or township hospitals within 2 hours, and implement the nucleic acid detection strategy of "village report, township sampling and county detection" to find the epidemic situation as soon as possible. Strengthen the health monitoring of close contacts and close contacts (hereinafter referred to as close contacts), entry personnel, high-risk occupational groups, and key groups included in community management. Once the above symptoms appear, they should be sent to the hospital for nucleic acid detection in time.

2. Report of asymptomatic infection. Asymptomatic infection refers to people who are positive for pathogens in COVID-19, but have no relevant clinical manifestations. It is mainly found through nucleic acid detection, infection source tracking, epidemiological investigation and crowd screening of key populations such as close contacts and close contacts, entry personnel and high-risk occupational groups. The asymptomatic infected persons found should be reported directly through China Disease Prevention and Control Information System within 2 hours, and transferred to designated medical institutions for centralized isolation medical observation within 2 hours. If there are related symptoms or signs in the follow-up, it should be revised into a confirmed case within 24 hours.

3. Report on the discovery of clustering epidemic. Cluster epidemic refers to the discovery of 5 or more cases and asymptomatic infected persons in schools, residential quarters, factories, natural villages and medical institutions within 14 days. It is mainly found through routine diagnosis and treatment activities, online direct reporting of infectious diseases, epidemiological investigation of cases or asymptomatic infected people, health monitoring of key places and institutions, and key populations. Aggregation epidemic should be reported through the network reporting management information system of public health emergencies within 2 hours.

(2) Multi-channel monitoring and early warning.

According to the principle of combining point with surface and combining infectious disease monitoring system with other departments' monitoring systems, we will carry out multi-channel monitoring of people, things and environment.

1. Monitoring of medical staff. Medical staff of all kinds of medical institutions at all levels, especially primary medical and health institutions, should raise their awareness of finding and reporting COVID-19's cases, and conduct COVID-19 nucleic acid tests on all patients with fever and other suspected patients without fever, cases of unexplained pneumonia and severe acute respiratory infection among hospitalized patients, all newly admitted patients and their accompanying staff.

2. Monitoring occupational groups at risk. Health monitoring and weekly full-time nucleic acid detection shall be carried out for the supervision and employees of imported cold chain food, management and service personnel of centralized isolation places, direct contact personnel of imported goods at ports, medical staff of designated medical institutions for cases in COVID-19, medical staff of fever clinics and emergency departments of comprehensive medical institutions, employees of international vehicles, ship drivers and other foreign ship operators, and frontline personnel of entry-exit, customs and market supervision systems. Found fever, dry cough, fatigue, sore throat, decreased sense of smell (taste), diarrhea and other symptoms. Go to a medical institution with a fever clinic (consulting room) for nucleic acid detection in time.

Weekly sampling nucleic acid detection was conducted for farmers' markets, other departments of comprehensive medical institutions, express delivery, transportation and other specific service places and industry personnel.

3. Health monitoring of key populations. Do a good job in health monitoring of people in high-risk areas, medical observers discharged from COVID-19, and immigrants brought into community management. Found fever, dry cough, fatigue, sore throat, decreased sense of smell (taste), diarrhea and other symptoms. Go to a medical institution with a fever clinic in time for nucleic acid detection.

4. Cargo and environmental monitoring. Sampling nucleic acid detection of imported cold chain foods and their processing, transportation, storage and sales places; Sampling nucleic acid detection is carried out on imported goods from high-risk countries and low-temperature transportation environment at land, sea and air ports, as well as their cargo holds, containers, carriages, containers and cargo storage places, and the detection frequency and sampling quantity can be increased under low-temperature conditions in winter.

Medical institutions with fever clinics and large agricultural products wholesale markets with cold chain food in cities regularly carry out nucleic acid detection. Regularly carry out sewage monitoring in large-scale processing places where frozen products are imported by sea.

5. Monitoring of key institutions. After there are 1 cases of confirmed cases or asymptomatic infected persons in this county (district), do a good job in daily health monitoring of personnel in key institutions such as pension welfare institutions, psychiatric hospitals, supervision places, crowded places (such as production workshops, shopping malls and supermarkets, training institutions), kindergartens and schools, and find fever, dry cough, fatigue, sore throat and odor.

6. Centralized monitoring in isolated places. During the opening of centralized isolation places, environmental nucleic acid detection should be carried out regularly.

7. Pathogen monitoring. The first or early cases in the local epidemic, key cases with epidemiological relevance to early cases, local cases with unknown infection source, imported cases, imported articles and related environmental positive samples were sequenced and compared to dynamically understand the genetic variation of the virus and find the infection source in time.

8. Analyze early warning. Strengthen cross-departmental information sharing, carry out comprehensive analysis of epidemic monitoring and risk judgment, put forward risk assessment results and early warning suggestions, and timely release epidemic information and health risk tips to the society.