Is the nucleic acid collection of employees in Sichuan a single collection or a mixed collection?
Both. Sichuan is carried out according to the scheme of single sampling test in key population and high-risk areas and mixed sampling test in low-risk areas, both of which are available. Single sampling, as the name implies, means that one person's collection swab is placed in a collection tube, and mixed sampling means that 10 person's collection swab is placed in a collection tube.