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Comparison of results of salivary sample with the results of standard NPS using the Thermo Fisher RT-PCR kit (n = 231).
| NPS sample (Thermo Fisher Applied Biosystems kit) | Positive | Negative | Total | |
|---|---|---|---|---|
| RNA extraction-free method for saliva (Thermo Fisher Applied Biosystems kit) | Positive | 200 | 3 | 203 |
| Negative | 2 | 26 | 28 | |
| Total | 202 | 29 | 231 | |
