What does the history of living in high-risk areas mean?

It is a self-declaration of where you are going, indicating where you and your family have been, so that the relevant institutions can judge whether this person is likely to be infected, because if you have been in a high-risk area, there is a certain possibility of being infected.

In order to prevent the import of overseas epidemic situation and maintain the good order of epidemic prevention and control work, all personnel should truthfully report their illness, life history, close contact personnel and other related information. Residence history is a self-declaration of your whereabouts, indicating where you and your family have stayed, so that the relevant institutions can judge whether this person has the possibility of infection, because if you have stayed in a high-risk area, there is a certain possibility of infection.

Matters needing attention in medium and high risk areas

Because there may be virus pollution in high-risk areas and the source of infection is unknown, people in this area are the key targets of "everything should be done" and need to be tested repeatedly. Because COVID-19 is characterized by its potential and concealment, if the virus concentration in the body is not enough and is lower than the detection limit, it may not be detected in the first nucleic acid detection.

Another possibility is that different people have different sampling methods and failed to collect suitable parts, resulting in missed detection; Finally, there may be a small number of infected people who have carried out clearance and detoxification. If the sampling time is wrong, it may cause missed detection. Therefore, it is necessary to detect pathogens more accurately, implement prevention and control more accurately, find infected people as soon as possible, cut off the virus transmission chain and carry out repeated detection in time.