I. Epidemic situation in high-risk areas:
1. Low-risk area: 14 days without confirmed cases in COVID-19 or newly confirmed cases in COVID-19.
2. Medium risk areas:
/kloc-new confirmed cases were added in 0/4 days, and there were no more than 50 confirmed cases in COVID-19. There are more than 50 confirmed cases in COVID-19, and no cluster epidemic occurred within 14 days.
3. High-risk areas:
There were more than 50 cases in COVID-19, and a cluster epidemic occurred within 14 days.
Specific division criteria:
1. Area: Streets and towns are the basic units.
2. Time: 14 days (the longest incubation period in COVID-19).
3. Epidemic situation: the longest incubation period in COVID-19.
To sum up, streets or areas are divided into three risk levels: high, medium and low, according to whether there are confirmed cases and cases with little ability in COVID-19 within 14 days. In addition, the specific classification criteria will be adjusted according to the changes in the epidemic situation in COVID-19.