Tianfu health code will "code" risk personnel according to the risk level according to the flow information and big data push of the disease control department. Generally speaking, the epidemiological investigation of cases is a continuous work. In this process, the risk personnel will be determined one after another according to the recent trajectory of the case, which may date back to a few days ago, so people sit at home, but the risk situation of the previous days (such as the intersection with the time and space of the case, being in a medium-high risk area, etc.). ) is assigned a code.
2. In order to effectively prevent the spread of the epidemic in the province, the provincial headquarters further strengthened the investigation and control of people with a history of living in Chengdu, and decided to assign emergency yellow codes to high-risk people who recently traveled from Chengdu to cities (states) in the province by public transport. Citizens may be judged as risk personnel and given a yellow code because of their recent residence and round-trip history between the city (state) and Chengdu.