The risk level of epidemic situation is divided into: high-risk areas, which generally means that there are more than 50 cases in COVID-19, and a cluster epidemic situation occurs within 14 days; In the medium-risk area, there were newly confirmed cases in COVID-19 14 days, and there were no more than 50 confirmed cases in COVID-19, and there were no clustered epidemics in 14 days; In low-risk areas, there are no confirmed cases in COVID-19, or there are no new confirmed cases in COVID-19 for 14 days. When an epidemic situation or a major health emergency occurs in the whole country, according to the actual situation and development trend of the current epidemic situation, the counties and cities are divided into low-risk, medium-risk and high-risk areas by comprehensively considering factors such as the number of newly added and accumulated confirmed cases. According to the severity, urgency and possible impact range of emergencies, the early warning levels are from low to high. The classification method and early warning color of early warning levels are as follows: level 4, general accident 1 ~ 2 deaths, and the early warning color is blue; Level 3, a major accident that may kill 3 ~ 9 people, and the warning color is yellow; Grade II, a major accident that may cause 10 ~ 29 deaths, and the warning color is orange; Grade I, a particularly serious accident that may cause more than 30 deaths, and the warning color is red.

High-risk area: generally speaking, the cumulative number of cases in COVID-19 exceeds 50, and a cluster epidemic occurs within 14 days. Medium-risk area: within 14 days, there were newly confirmed cases in COVID-19, and the cumulative confirmed cases in COVID-19 were no more than 50; * * * More than 50 cases were diagnosed, and no clustering epidemic occurred within 14 days. Low-risk areas: the case in COVID-19 has not been diagnosed, or COVID-19 has not been newly diagnosed for 14 days.

Legal basis: People's Republic of China (PRC) Law on the Prevention and Control of Infectious Diseases.

Article 43 When Class A and Class B infectious diseases break out and become epidemic, the local people's governments at or above the county level may, upon the decision of the people's government at the next higher level, declare part or all of their administrative areas as epidemic areas; The State Council can decide and publish epidemic areas across provinces, autonomous regions and municipalities directly under the Central Government.