Health code1* * has three colors, namely, green code, yellow code and red team, among which red team is a high-risk early warning personnel and needs to be observed in isolation to prevent the spread of infection.
During the isolation period, four nucleic acid tests will be conducted. After the isolation is lifted, double sampling and double inspection will be carried out, that is, two different samples of the subjects will be put into the same test tube at the same time, and two samples will be collected for inspection to avoid false positives or false negatives. If all the nucleic acid test results are negative and the health declaration is normal, the isolation can be lifted, and the health code will turn into a green code, and the whole cycle will take about 14 days.