Table 4 Minimum standards for prevention and control measures for points of interest at different risk levels.

From: Assessment of the impact of reopening strategies on the spatial transmission risk of COVID-19 based on a data-driven transmission model

Risk level

Minimum standard prevention and control measures

High risk

Restrict reopening completely. Points of interest that belong to a high risk level should not implement a reopening strategy until the outbreak is under control. The increasing number of confirmed cases will intensify the trend of the spread of the epidemic, making it more difficult to prevent and control the epidemic, and even leading to the loss of the effectiveness of the original epidemic efforts. Therefore, a reopening strategy should not be adopted for high-risk interests

Medium risk

Partial restriction on reopening. Points of interest that belong to the medium risk level also have an impact on the development of the epidemic to a certain extent. Therefore, the strategy of partial reopening can be adopted for points of interest that have an impact on people's daily production and living needs. For example, it is concentrated on a certain day of the week or a certain point of the day and not open the rest of the time; it is open according to the street, and each street has a fixed time in the month to open, etc. At the same time when people go to a point of interest with a medium risk level, they should take protective measures, show a health code and trip code, keep at least one-meter distance from others, and do not gather. Merchants should arrange staff to do a good job of measuring body temperature, registering basic information and maintaining the order of people entering the point of interest, ensuring that basic disinfection work has been completed when each person enters the store, and conducting extensive disinfection and sterilization work on the whole business premises after the end of the day's business

Low risk

Free and orderly opening in the same low-risk area locally. For low-risk points of interest in low-risk areas, people can move freely and orderly with basic protection. Merchants arrange for staff to take body temperature measurements, and people simply need to show their health code and not remove their masks in public places. In this case, all types of points of interest can be reopened with the completion of the minimum standards of prevention and control measures