What does epidemic prevention 3+2 mean?

Epidemic prevention 2+5 means 2 days closed-loop management +5 days self-health management.

According to the official announcement of the state and CCTV, in order to control the risk of epidemic spread, 2+5 measures were taken to control the epidemic situation in the relevant places and areas involved by close contacts, that is, 2 days of closed-loop management and 5 days of self-health management measures.

That is, the building where close contacts live, the work unit of close contacts, the medical institutions and schools involved in close contacts take control measures, and the first two days are closed-loop management, and the last five days are self-health management.