How many times do people in hotel quarantine undergo double sampling and double testing?

2 times.

1. All arrivals must complete nasopharyngeal swab nucleic acid tests on days 1, 4, 7, 10, and 14 of the centralized quarantine period, and on days 2 and 7 of the home quarantine period. For nucleic acid testing on the 14th day and the 7th day of the home isolation period, two nasopharyngeal swabs should be collected and tested using different nucleic acid testing reagents respectively. The two tests should be carried out by different testing institutions (hereinafter referred to as dual collection and dual testing).

2. People who have arrived from outside the province and have been released from centralized quarantine, or who have been invited to Sichuan by a team that has been invited to Sichuan for less than 21 days when they arrive in our city, should be transported to a home quarantine location by a local closed-loop transfer. Implement home quarantine until 21 days.

3. If there is no place for home isolation, the local designated isolation hotel will conduct centralized isolation. During the isolation period, nasopharyngeal swab nucleic acid testing will be carried out twice, and double sampling and double testing will be used when the isolation is released.