Detailed steps are as follows:
1.
On the last day of isolation, two nasopharyngeal swab specimens were collected at the same time, and two nucleic acid tests were performed using two nucleic acid test reagents, and the two tests, which were conducted by different testing organizations in principle, were both negative. The results of environmental sampling in the room where the close contact was located were also negative.
2.
3. No abnormalities in the health monitoring of the staff in the quarantine place within 14 days, and no abnormalities in the nucleic acid test. Then they can get ready to go home