How to calculate the number of days after being isolated for 4 days in the risk control area and then being isolated collectively?

Start by entering the quarantine point.

The start date of isolation is calculated from the date of entering the isolation point. If the epidemic situation shows that it has spread in the isolation point, it will be recalculated from the date when the last positive infected person is transferred out of the isolation point.

Close contacts and people who are in the same unit (corridor) as the confirmed cases (asymptomatic infected persons) must be isolated 14 days. Since the centralized isolation, 1 time nucleic acid detection has been carried out every day, and 14 days of parallel detection with double collection and double detection have all negative results, so the isolation can be lifted.