What does "2+12" flow investigation mean?

the meaning of+12 epidemiological investigation is as follows: "2", that is, closed management is carried out within 2 days, that is, nucleic acid detection is carried out twice with an interval of more than 24 hours. "12", that is, strict community management, requires relevant personnel not to go out unless necessary. If they want to go out, they should wear masks for personal protection, and at the same time, they should not participate in or go to gathering places.

epidemic situation:

epidemiological investigation

epidemiological investigation (abbreviated as epidemic situation) refers to the investigation and study conducted by epidemiological methods. It is mainly used to study the distribution and determinants of diseases, health and hygiene events. Through these studies, reasonable preventive health care countermeasures and health service measures will be put forward, and the effects of these countermeasures and measures will be evaluated.

Epidemiological investigation is an important work carried out according to the Law of the People's Republic of China on the Prevention and Control of Infectious Diseases and the Emergency Regulations for Public Health Emergencies.