1. Low risk: no confirmed cases or no new confirmed cases for 14 consecutive days;
2. Medium risk: new confirmed cases within 14 days, with no more than 50 cumulative confirmed cases, or more than 50 cumulative confirmed cases, with no aggregated outbreaks within 14 days;
3. High risk: more than 50 cumulative cases. Aggregate outbreak occurs within 14 days.
Low-, medium- and high-risk areas have the following prevention and control strategies:
1. Low-risk areas: the implementation of the "external prevention and importation" strategy. Strengthen the tracking and management of the inflow of people from areas with serious epidemics and high-risk areas, and do a good job of health monitoring and services. Medical institutions to strengthen the fever outpatient case monitoring, detection, reporting, CDC agencies to carry out timely epidemiological investigations and close contact tracing management. Supervise and guide urban and rural communities, institutions, enterprises and public institutions to strictly implement community prevention and control measures, do a good job of environmental health improvement, public knowledge of disease prevention and the popularization of protective skills;
2, medium-risk areas: the implementation of the "external preventive importation, internal preventive proliferation" strategy. On the basis of the measures taken in low-risk areas, to do a good job of medical treatment, disease prevention and control of personnel, materials, places and other aspects of the preparation of cases of close contacts in isolation for medical observation and management. Taking school classes, building units, factory workrooms, workplace offices, etc. as the smallest units, and taking the case discovery, epidemiological investigation and epidemic analysis as the clues, the places and personnel for prevention and control management are reasonably determined, and targeted prevention and control measures are implemented. No confirmed cases of townships, streets, urban and rural communities can refer to low-risk areas to take preventive and control measures;
3, high-risk areas: the implementation of the "internal proliferation prevention, external export prevention, strict control" strategy. On the basis of the measures taken in medium-risk areas, stop gathering activities, according to the law and procedures for approval can be implemented after regional traffic control. On a county-by-county basis, comprehensively investigate patients with fever, promptly admit and manage suspected cases, confirmed cases and asymptomatic infected persons, and isolate close contacts for medical observation. Disinfect relevant places in urban residential areas (rural natural villages) where community transmission or aggregated outbreaks have occurred, and take control measures such as restricting the gathering of people and their entry and exit.
Legal basis: "the Chinese people's *** and the State Law on Prevention and Control of Infectious Diseases" Article 12 in the Chinese people's *** and the State field of all units and individuals, must accept disease prevention and control institutions, medical institutions related to infectious diseases, investigation, testing, collection of samples, isolation and treatment and other preventive, control measures, and to truthfully provide the relevant information. Disease prevention and control institutions, medical institutions shall not disclose relevant information involving personal privacy, information.
Health administrative departments and other relevant departments, disease prevention and control institutions and medical institutions due to the illegal implementation of administrative or preventive, control measures, infringement of the legitimate rights and interests of units and individuals, the relevant units and individuals can apply for administrative reconsideration or litigation in accordance with the law.