Qinghai News Network beautiful qinghai Client News "Excuse me, I have lived near the closed control area before, is it a close contact?" "I’ve been on that bus, but not at the same time. Do I count as a time-space intersection?" Recently, many Xining citizens have consulted the hotline of the Evening News. What are close contacts, sub-close contacts and people with intersection of time and space? In order to answer the public’s questions, on November 2, the reporter interviewed the relevant person in charge of the Xining Municipal Health and Health Commission.

　　"What do you mean by" secret connection "and" secondary secret connection "? How to divide? Need to give the public a science popularization. " The relevant person in charge of the Municipal Health and Health Commission said, "A, B, C and D can be used as an analogy. If A is a confirmed case, B and A have lived, worked and eaten together, which is a close contact. There is a similar relationship between C and B, that is, the close contact of the close contact, and then C is the second close contact. D has had an intersection with A and B, but it has not been in close contact. " In the epidemiological investigation, the sub-close contacts mainly investigate the close contacts of close contacts, that is, people who have had close contact with close contacts, such as living together, working in the same closed environment, having dinner and entertainment, but have not taken effective protection from the first contact between close contacts and cases or asymptomatic infected people (two days before onset) until the close contacts are isolated and managed. The investigation focuses on people such as family members and colleagues who have frequent contact with close contacts.

　　What is the intersection of time and space? According to reports, "intersection of time and space" is a professional term of the public security and telecommunications departments. Space-time intersection and space-time accompaniment are the same concept, which means that within 14 days, they stayed with the diagnosed patient for 10 minutes in the same time and space grid (800 m× 800 m). In layman’s terms, it has crossed with the travel trajectory of the confirmed patient within 14 days. Whether the communication signal drifts or passes by, it may be identified as a time-space intersection crowd.

　　If citizens are worried that they are close contacts and that they have had an intersection with confirmed or suspected patients? You can log on to WeChat to scan the health code and travel code to see if it turns red or yellow. Once you find that it is given a "red or yellow code", you must take the initiative to report it to your community and unit at the first time, and actively cooperate with the implementation of nucleic acid detection, centralized isolation, medical observation, health monitoring and other control measures.