The epidemic risk levels are divided into: high-risk areas, which generally refer to the cumulative number of new crown cases exceeding 50, and there are clusters of epidemics within 14 days; medium-risk areas, where there are new confirmed cases of new crown pneumonia within 14 days, and the total number of confirmed cases of new coronavirus pneumonia The number of cases does not exceed 50, the total number of confirmed cases exceeds 50, and no cluster epidemic has occurred within 14 days; in low-risk areas, there are no confirmed cases of new coronavirus pneumonia, or there are no new confirmed cases of new coronavirus for 14 consecutive days. When an epidemic or major health emergency occurs in the country, based on the actual situation and development trend of the current epidemic, taking into account factors such as the number of new and cumulative confirmed cases, the county and city are divided into: low-risk areas, medium-risk areas, High risk area. Early warnings are graded according to the severity, urgency and possible scope of the emergency. The early warning levels are from low to high. The early warning level grading method and early warning colors are as follows: Level 4, a general accident that may kill 1 to 2 people, the early warning color is Blue; Level 3, a major accident that may kill 3 to 9 people, the warning color is yellow; Level 2, a major accident that may kill 10 to 29 people, the warning color is orange; Level 1, a special accident that may kill more than 30 people For major accidents, the warning color is red.

: High-risk areas: generally refer to areas where the cumulative number of COVID-19 cases exceeds 50, and a cluster of epidemics occurs within fourteen days. Medium-risk areas: There are new confirmed cases of COVID-19 within 14 days, and the total number of confirmed cases of COVID-19 does not exceed 50; ***The total number of confirmed cases exceeds 50, and no cluster epidemic has occurred within 14 days. Low-risk areas: No confirmed cases of COVID-19, or no new confirmed cases of COVID-19 for 14 consecutive days.

Legal basis: "Law of the People's Republic of China on the Prevention and Control of Infectious Diseases"

Article 43 When Class A and Class B infectious diseases break out or become popular, Local people's governments may declare part or all of their administrative regions as epidemic areas after reporting to the people's government at the next higher level for decision; the State Council may decide and declare epidemic areas across provinces, autonomous regions, and municipalities directly under the Central Government.