Shanghai is in the stage of encircling the epidemic and fishing dry. How can we win the final victory?

First of all, Shanghai must establish a normalized large-scale screening mechanism. The admission requirement of 48-hour nucleic acid negative in all places is still retained. This normalized nucleic acid requires that social and non-closely-connected positives can be screened out and processed at the first time.

Secondly, it is necessary to get most communities out of the strange circle of 7+7+7 infinite cycle. At present, from the data of various aspects and the information of friends circle, there are many closed communities in Shanghai that have appeared nucleic acid positive after being negative for several days in a row. Of course, some of the nucleic acids can't be detected in the incubation period, but the virus doubling time of Omicron BA.2 is shorter, the virus concentration is higher, the CT value of nucleic acid detection is lower, and the overall incubation period is much shorter, so many possibilities of new infections must be considered.

Furthermore, if a community is really closed, the biggest virus input port is likely to come from places where there is exchange with the outside world, such as express delivery port, food intake port and garbage disposal place. Nor does it rule out the possibility of positive medical care when doing nucleic acid. Here, all groups that need riders, volunteers, medical care, etc. to flow in the society must be checked once a day (single tube) and can only enter and leave the community if they are negative for 24 hours. In addition, in addition to checking people, it is necessary to sample the environment of the express delivery port, the food intake port, the garbage place and other places in the community every day to monitor the exchange place between the community and the outside world at all times. Various distribution centers need to take multiple samples and check them once a day to prevent them from becoming the source of spreading viruses.

finally, Shanghai must be able to handle and isolate all secret connections. If close contact is not isolated, the epidemic will never end. In the closed state, close contact tracking is relatively simple, because people are relatively static and not circulating. Once the city is restarted, it will be a great workload to follow closely. If this work is not done well, Shanghai epidemic prevention will be wasted. It is necessary to arrange all places to use place codes, electronic sentries and other similar tools in an all-round way, and manage any entrance and exit.