SARS-CoV-2 surveillance by RT-qPCR-based pool testing of saliva swabs (lollipop method) at primary and special schools—A pilot study on feasibility and acceptability
Fig 2
Schematic illustration of the saliva swab pool PCR testing procedure in schools.
Here, the blue balls represent the SARS-CoV-2 negative individuals, whereas a red ball represents the positively tested individual(s).