How many people are at risk of the epidemic?

Medium-risk areas are generally areas where cases and asymptomatic infected people stay and flow for a certain period of time, and there may be risks of epidemic spread, such as workplaces and activity places. According to the results of traffic investigation and judgment, determine the scope of risk areas. Control measures such as "people don't leave the area, taking things at different peaks" were taken in the middle-risk area, and no new infections were reduced to the low-risk area for 7 consecutive days.

In other areas, people with a 7-day residence history were observed at home for 7 days, and nucleic acid detection was carried out on 1, 4 and 7 days respectively; Do not have the conditions for home isolation medical observation, take centralized isolation medical observation; The management period starts from leaving the risk area.