2. When you go to Beijing by train, all railway stations in Beijing will check the passenger health code 100% at the entrance, and the green code will pass, and the red code and the yellow code will dissuade you. For the elderly, children and other off-line people, the staff used the function of "others' health code inquiry" to help with the inquiry. To enter Beijing by train, you need a 48-hour "remote inspection" negative nucleic acid certificate, and you can enter (return to) Beijing with the green code of "Beijing Health Treasure".
What is the difference between "single sampling" and "mixed sampling" in nucleic acid detection?
Single sampling is mainly suitable for high-risk areas and key populations, collecting nasal, pharyngeal and sputum samples, and carrying out single-person and single-tube sampling and testing to determine whether the subject carries the virus and infection status, so as to find and deal with it early. Low-risk areas can be mixed according to the ratio of 10: 1, and medium-risk areas can be mixed according to the detection ability of 1: 1 or 5: 1. Mixed sampling detection is a widely used nucleic acid detection and screening method in COVID-19. When the overall positive rate of the population is low (below 0. 1%), it can obviously improve the detection efficiency, speed up the detection, and minimize the risk of imported COVID-19 epidemic and local transmission. "Recently, asymptomatic infected people were found in many areas of Shandong Province through mixed mining testing, which played an important role in finding positive testers as soon as possible and controlling the epidemic in time." Ding Shujun told reporters.
In the specific operation, a single collection tube is one tube for each person, and the oropharyngeal swab or nasopharyngeal swab samples of one person are collected and put into a separate collection tube for laboratory testing. Mixed sampling is to put swab samples from multiple people into a collection tube for testing. The positive result of a single sampling tube suggested that the collected person was infected with COVID-19 virus. If the mixed sampling tube is positive, the relevant departments will immediately temporarily isolate 5 people, 10 or 20 people collected by the mixed sampling tube, and re-collect the single-tube swab of each person for re-inspection to determine which person or persons in the tube are positive.
Legal basis: Article 12 of the Law on the Prevention and Control of Infectious Diseases stipulates that "all units and individuals in People's Republic of China (PRC) must accept the investigation, inspection, sample collection and isolation treatment of infectious diseases by disease prevention and control institutions and medical institutions, and provide relevant information truthfully".